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Accueil >> REGULATORS > REGULATORS 2ND STAGE de plongée
 de plongée Atomic Aquatics Ss1 Titanium Black

271.01 EUR

Atomic Aquatics Ss1 Titanium Black



Atomic Aquatics Ss1 Titanium Black. Why The SS1- - The SS1 is the newest and most sophisticated product of its type, taking the concept to new levels of convenience, reliability and performance as only Atomic Aquatics can deliver.The SS1 Breathes Just Like A Primary - Atomic engineers a new level of performance into safe seconds - The SS1 is truly a fresh innovation on a longtime concept. While others prioritize the convenience of the combination, Atomic placed equal importance on superior materials, reliability and high performance natural breathing. SS1 Performance & Durability - The SS1 delivers high flow rates to a diver at depth with a minimum of effort. It is very stable and not prone to unnecessary free-flow or leakage from water movement while swimming or during entries/exits. The inflator/deflator is easy to operate with soft surfaced buttons placed where they can be easily operated with one hand. The SS1 is constructed of quality materials not found in any other safe second on the market. - The quick disconnect coupling, regulator valve body, and inflation and deflation stems are machined from type 316 Stainless Steel or Titanium to avoid corrosion that would eventually seize components or degrade performance and function. The regulator orifice and lever are Titanium for maximum strength and reliability.SS1 Adaptability & Convenience - One of the most unique features of the SS1 is its adaptability to almost any BCD. We have designed a set of adapters to fit virtually every popular BCD brand available (and many that are not). The adapters also include components for attaching the cable exhaust feature of your existing BCD (if applicable). - The SS1 features a quick disconnect not only on the low-pressure hose, but the BCD hose as well. The adapters that fit the SS1 to the BCD are connected to the SS1 with a threaded collar that can be easily unscrewed to detach it completely from the BCD enabling you to carry or store the SS1 with your primary regulator and gauges. The SS1 offers pneumatic or oral inflation for buoyancy control and back-up breathing in one small package.• High-Flow LP Hose & DisconnectThe high-flow, low pressure disconnect is interchangeable with many other models yet smaller size and lighter in weight.• Multi-Configuration AdaptabilityThe first product of its kind adaptable to a wide variety of BCD hoses and sizes. The SS1 can be fitted to virtually any make or model BCD. (U.S. Patent # 6,761,163)• Ergonomic ControlsLarge oversized and ergonomically-shaped buttons are easy to find for pneumatic or oral inflation/deflation. They are easy to distinguish and faced with soft tactile rubber surfaces.• Low-Profile Elliptical DesignThe elliptically-shaped body of the SS1 lies flat against the BCD keeping it out of the way and reducing drag.• Unique & Convenient BCD Quick-Disconnect SystemThis feature gives you the option to remove the SS1 from the jacket for transport with your regulator system or use on another BC. (U.S. Patent # 6,761,163)• Atomic Patented Seat Saving OrificeSeat wear is the first cause of regulator leaks and performance degradation. The stainless steel dynamic orifice is pressure energized and only contacts the rubber seat when in use.• Titanium LeverThis high-strength metal part is the link to your air supply and will never fail due to rust or corrosion.• Integrated Purge CoverOne-piece flexible cover allows purge of the regulator when depressed anywhere on the cover surface.• 2-Year / 300 Dive Service IntervalThe same high-quality components, materials and designs as our primary regulators mean the same trouble-free operation and the unparalleled Atomic Aquatics service interval.• Limited Lifetime WarrantyJust like the warranty on all Atomic regulators, it is not contingent on proof of annual service.
 de plongée Atomic Aquatics Ss1 Yellow

203.01 EUR

Atomic Aquatics Ss1 Yellow



Atomic Aquatics Ss1 Yellow. Why The SS1- - The SS1 is the newest and most sophisticated product of its type, taking the concept to new levels of convenience, reliability and performance as only Atomic Aquatics can deliver.The SS1 Breathes Just Like A Primary - Atomic engineers a new level of performance into safe seconds - The SS1 is truly a fresh innovation on a longtime concept. While others prioritize the convenience of the combination, Atomic placed equal importance on superior materials, reliability and high performance natural breathing. SS1 Performance & Durability - The SS1 delivers high flow rates to a diver at depth with a minimum of effort. It is very stable and not prone to unnecessary free-flow or leakage from water movement while swimming or during entries/exits. The inflator/deflator is easy to operate with soft surfaced buttons placed where they can be easily operated with one hand. The SS1 is constructed of quality materials not found in any other safe second on the market. - The quick disconnect coupling, regulator valve body, and inflation and deflation stems are machined from type 316 Stainless Steel or Titanium to avoid corrosion that would eventually seize components or degrade performance and function. The regulator orifice and lever are Titanium for maximum strength and reliability.SS1 Adaptability & Convenience - One of the most unique features of the SS1 is its adaptability to almost any BCD. We have designed a set of adapters to fit virtually every popular BCD brand available (and many that are not). The adapters also include components for attaching the cable exhaust feature of your existing BCD (if applicable). - The SS1 features a quick disconnect not only on the low-pressure hose, but the BCD hose as well. The adapters that fit the SS1 to the BCD are connected to the SS1 with a threaded collar that can be easily unscrewed to detach it completely from the BCD enabling you to carry or store the SS1 with your primary regulator and gauges. The SS1 offers pneumatic or oral inflation for buoyancy control and back-up breathing in one small package.• High-Flow LP Hose & DisconnectThe high-flow, low pressure disconnect is interchangeable with many other models yet smaller size and lighter in weight.• Multi-Configuration AdaptabilityThe first product of its kind adaptable to a wide variety of BCD hoses and sizes. The SS1 can be fitted to virtually any make or model BCD. (U.S. Patent # 6,761,163)• Ergonomic ControlsLarge oversized and ergonomically-shaped buttons are easy to find for pneumatic or oral inflation/deflation. They are easy to distinguish and faced with soft tactile rubber surfaces.• Low-Profile Elliptical DesignThe elliptically-shaped body of the SS1 lies flat against the BCD keeping it out of the way and reducing drag.• Unique & Convenient BCD Quick-Disconnect SystemThis feature gives you the option to remove the SS1 from the jacket for transport with your regulator system or use on another BC. (U.S. Patent # 6,761,163)• Atomic Patented Seat Saving OrificeSeat wear is the first cause of regulator leaks and performance degradation. The stainless steel dynamic orifice is pressure energized and only contacts the rubber seat when in use.• Titanium LeverThis high-strength metal part is the link to your air supply and will never fail due to rust or corrosion.• Integrated Purge CoverOne-piece flexible cover allows purge of the regulator when depressed anywhere on the cover surface.• 2-Year / 300 Dive Service IntervalThe same high-quality components, materials and designs as our primary regulators mean the same trouble-free operation and the unparalleled Atomic Aquatics service interval.• Limited Lifetime WarrantyJust like the warranty on all Atomic regulators, it is not contingent on proof of annual service.
 de plongée Atomic Aquatics Ss1 Red

203.01 EUR

Atomic Aquatics Ss1 Red



Atomic Aquatics Ss1 Red. Why The SS1- - The SS1 is the newest and most sophisticated product of its type, taking the concept to new levels of convenience, reliability and performance as only Atomic Aquatics can deliver.The SS1 Breathes Just Like A Primary - Atomic engineers a new level of performance into safe seconds - The SS1 is truly a fresh innovation on a longtime concept. While others prioritize the convenience of the combination, Atomic placed equal importance on superior materials, reliability and high performance natural breathing. SS1 Performance & Durability - The SS1 delivers high flow rates to a diver at depth with a minimum of effort. It is very stable and not prone to unnecessary free-flow or leakage from water movement while swimming or during entries/exits. The inflator/deflator is easy to operate with soft surfaced buttons placed where they can be easily operated with one hand. The SS1 is constructed of quality materials not found in any other safe second on the market. - The quick disconnect coupling, regulator valve body, and inflation and deflation stems are machined from type 316 Stainless Steel or Titanium to avoid corrosion that would eventually seize components or degrade performance and function. The regulator orifice and lever are Titanium for maximum strength and reliability.SS1 Adaptability & Convenience - One of the most unique features of the SS1 is its adaptability to almost any BCD. We have designed a set of adapters to fit virtually every popular BCD brand available (and many that are not). The adapters also include components for attaching the cable exhaust feature of your existing BCD (if applicable). - The SS1 features a quick disconnect not only on the low-pressure hose, but the BCD hose as well. The adapters that fit the SS1 to the BCD are connected to the SS1 with a threaded collar that can be easily unscrewed to detach it completely from the BCD enabling you to carry or store the SS1 with your primary regulator and gauges. The SS1 offers pneumatic or oral inflation for buoyancy control and back-up breathing in one small package.• High-Flow LP Hose & DisconnectThe high-flow, low pressure disconnect is interchangeable with many other models yet smaller size and lighter in weight.• Multi-Configuration AdaptabilityThe first product of its kind adaptable to a wide variety of BCD hoses and sizes. The SS1 can be fitted to virtually any make or model BCD. (U.S. Patent # 6,761,163)• Ergonomic ControlsLarge oversized and ergonomically-shaped buttons are easy to find for pneumatic or oral inflation/deflation. They are easy to distinguish and faced with soft tactile rubber surfaces.• Low-Profile Elliptical DesignThe elliptically-shaped body of the SS1 lies flat against the BCD keeping it out of the way and reducing drag.• Unique & Convenient BCD Quick-Disconnect SystemThis feature gives you the option to remove the SS1 from the jacket for transport with your regulator system or use on another BC. (U.S. Patent # 6,761,163)• Atomic Patented Seat Saving OrificeSeat wear is the first cause of regulator leaks and performance degradation. The stainless steel dynamic orifice is pressure energized and only contacts the rubber seat when in use.• Titanium LeverThis high-strength metal part is the link to your air supply and will never fail due to rust or corrosion.• Integrated Purge CoverOne-piece flexible cover allows purge of the regulator when depressed anywhere on the cover surface.• 2-Year / 300 Dive Service IntervalThe same high-quality components, materials and designs as our primary regulators mean the same trouble-free operation and the unparalleled Atomic Aquatics service interval.• Limited Lifetime WarrantyJust like the warranty on all Atomic regulators, it is not contingent on proof of annual service.
 de plongée Cressi Xs Compact Second Stage

74.70 EUR

Cressi Xs Compact Second Stage



Cressi Xs Compact Second Stage. A true featherweight second stage, the XS Compact is built from lightweight techno-polymers to eliminate jaw fatigue.Easy to pack and easy to dive, the XS Compact includes dive/pre-dive Venturi switch for managing freeflow and maximizing performance at depth. Features:- Compact shape reduces weight and in-water drag.- Nearly all of the face acts as a purge button for easy access and fast clearing.- Dive/pre-dive Venturi switch boosts air delivery at depth and minimizes freeflow at the surface.- Streamlined exhaust tee directs bubbles to the side for a clear field of view.- Made from lightweight techno-polymers, reducing jaw fatigue while diving and reducing overall weight for travel.
 de plongée Cressi Xs2 Second Stage

72.00 EUR

Cressi Xs2 Second Stage



Cressi Xs2 Second Stage. - XS2 is the most inexpensive regulator in the Cressi range. The XS2 2nd stage comes with the traditional Cressi AC2 piston 1st stage. - Constantly reviewed over the years, this regulator has lots of admirers in the world due to the fact that it is extremely simple and strong, features that make it easy to use and result in low-cost maintenance.2nd stage XS2 - The body of the 2nd stage is traditionally sized, made from hi-tech polymers and with a lateral valve downstream system with adjustable orifice, simple and extremely reliable. - A flow of pilot air is channelled to the mouthpiece by injection, enhancing the performance. The 2nd stage comes with a a flow deviator that acts on the Venturi effect, with dive/pre-dive function. - In any case, performance levels are high, and it is suitable for any kind of dive.
 de plongée Cressi Second Stage Ellipse Titanium

134.46 EUR

Cressi Second Stage Ellipse Titanium



Cressi Second Stage Ellipse Titanium. 2nd stage Ellipse TitaniumA latest generation regulator, loved by both professional and recreational divers thanks to its excellent performance. The small size, combined with the use of sophisticated techno-polymers and various titanium parts allow the weight to be kept to an exceptional minimum. Technologically the regulator is truly avant-garde, thanks to a series of unprecedented features, covered by a patent, that enhance its performance. Amongst which:The elliptical casing with special fold out opening. Instant cam-lock closure of the casing.The folding diaphragm for use with a large regulator lever. The regulator lever with its computer designed profile.The tilting movement of the piston. The insulating anti-freeze between the regulator valve and casing.The possibility of removing the entire regulating system from the body of the 2nd stage, for quick and easy maintenance.The result of so much technology is a regulator that supplies air smoothly and with unprecedented fluidity.All this with an excellent price/quality ratio.Technical features of the 2nd stage Ellipse Titanium •Average inhalation effort: 4 mbar•Average exhalation effort: 11 mbar•Average breathing labour: 0.95 J/l•Quantity of air supplied: 1800 l/m (*)•Weight without hose 158 g(*) Values measured in compliance with standard UNI EN 250.
 de plongée Hollis 221 Balanced Without Hose

84.62 EUR

Hollis 221 Balanced Without Hose



Hollis 221 Balanced Without Hose. The Hollis 221 Second Stage Regulator is a Pneumatically Balanced Demand Valve Design. The Hollis 221 Second Stages also has an Adjustable Venturi System (A.V.S). This simple Dive/Pre-Dive Switch allows the diver to Adjust Inhalation Effort so the Second Stage wont Free-Flow during shore entries or long surface swims. The Control Knob has an Easy Grip for Precise Adjustments even while Wearing Gloves. The Hollis 221 Second Stage Housing is manufactured from Durable ABS/Polycarbonate. Regulator also comes equipped with a Patented Orthodontic Silicone Rubber Mouthpiece for Comfort and Reduced Jaw Fatigue. - Pneumatically balanced second stage - Ergonomic A.V.S. (Adjustable Venturi System) Dive/Pre-Dive Switch - Patented Orthodontic Mouthpiece with High Density Bite Tabs
 de plongée Hollis 212 Balanced Without Hose Non Swivel

104.79 EUR

Hollis 212 Balanced Without Hose Non Swivel



Hollis 212 Balanced Without Hose Non Swivel. The Hollis 212 Second Stage Regulator is a Pneumatically Balanced Demand Valve Design with a Patented Dynamic Adjustment that once set Automatically Maintains Inhalation Effort throughout the Dive by Compensating for Depth Changes. The Hollis 212 Second Stages also has an Adjustable Venturi System. This simple Dive/Pre-Dive Switch allows the diver to Adjust Inhalation Effort so the Second Stage wont Free-Flow during shore entries or long surface swims. All Controls are Easy Grip Controls for Precise Adjustments even while Wearing Gloves. The Hollis 212 Second Stage Housing is manufactured from Durable ABS/Polycarbonate. - Pneumatically balanced second stage - Patented Dynamic Adjustment once set automatically maintains inhalation effort throughout the dive by compensating for depth changes - Patented Orthodontic Mouthpiece for comfort and reduced jaw fatigue - Easy grip controls for precise adjustment even while wearing gloves - Venturi Switch for simple Dive/Pre-Dive modes
 de plongée Oceanic Delta 4.2 With Maxflex Swivel

153.03 EUR

Oceanic Delta 4.2 With Maxflex Swivel



Oceanic Delta 4.2 With Maxflex Swivel. The Delta 4.2 is one hot new regulator ready to take on all challengers with a new stylish look and FDX-10 First Stage featuring DVT ( Dry Valve Technology). - Cosmetic makeover with new stylish colors - Diver adjustable inhalation effort - Patented Orthodontic Mouthpiece with high-density bite tabs - Patented Dynamic Adjustment automatically maintains inhalation effort throughout the dive - Adjustable Venturi Switch (A.V.S.) for simple Dive/Pre-Dive Adjustment - Inline ball swivel for reduced jaw fatigue and comfort - Paired with the FDX-10 Over-Balanced Diaphragm First Stage available with Oceanics DVT (Dry Valve Technology) - Now available with MaxFlex Hose which is a lightweight, flexible, Braided hose designed to outperform and outlive traditional rubber hoses.Patented Dynamic Adjustment - A common objection to adjustable second stages is that divers cant imagine themselves twisting and turning a knob as they descend and ascend through the depths. If inhalation resistance is set near zero at depth, your ascent would require you to manually increase resistance as ambient water pressure is reduced to prevent free-flow. Taking another stride beyond common second stage engineering, Oceanic designed a patented DYNAMIC ADJUSTMENT feature into the heart of the Delta 4.2. This mechanically balanced valve maintains a preferred breathing resistance throughout the dive. Set it once and the Delta 4.2 automatically adjusts to make breathing as easy at 100 feet as it is at 30 feet - with no additional manual adjustment.Diver adjustable inhalation effort - Most downstream demand valve regulators are calibrated during manufacturing to a single, middle of the road operation. Whether finning up current at 100+ feet or merely snorkeling out to the dive site, this factory adjustment may not be optimum for the wide variety of demands we place on our equipment. A simple twist of the Delta 4.2s adjustment knob enables complete control...set the inhalation requirement to near zero when you need ultimate performance, or tune it for greater resistance as conditions or preferences change.Patented Dynamic Adjustment - A common objection to adjustable second stages is that divers cant imagine themselves twisting and turning a knob as they descend and ascend through the depths. If inhalation resistance is set near zero at depth, your ascent would require you to manually increase resistance as ambient water pressure is reduced to prevent free-flow. Taking another stride beyond common second stage engineering, Oceanic designed a patented DYNAMIC ADJUSTMENT feature into the heart of the Delta 4.2. This mechanically balanced valve maintains a preferred breathing resistance throughout the dive. Set it once and the Delta 4.2 automatically adjusts to make breathing as easy at 100 feet as it is at 30 feet - with no additional manual adjustment. Adjustable Venturi System (A.V.S.) - The A.V.S. deflector vane found in the Delta 4.2 diverts the airflow from the valve directly to the mouthpiece, producing smooth venturi-assisted inhalation. With the addition of a user Adjustable Venturi System (A.V.S.), in the form of a simple yet ingenious switch, full adjustment control rests in the hands of the diver.Inline Swivel - Ever notice that nearly every picture you see of a diver, their regulator looks like it’s not the least bit comfortable- The Delta 4.2 features an ergonomically designed in-line swivel for ultimate comfort.Improved Adjustment Mechanisms - Both the Dynamic Adjustment Knob and A.V.S. Switch are designed to be unobtrusive, yet easily manipulated even with the thickest gloves.Surge Deflector - Our surge protector (the titanium, blue or yellow that you see in the images above) reduces freeflow caused by surge or oncoming current. Computer optimized design - Oceanic regulators are exclusively designed using the latest 3-D computer modeling techniques. This allows us the ability to model and test performance while still in the early stages of development. The Delta 4.2s unique deflector vane and housing design diverts airflow from the valve directly to the mouthpiece, producing smooth venturi-assisted inhalation. Lightweight - The Delta 4.2s housing is made from an ABS/Polycarbonate composite blend of materials making the Delta 4.2 both extremely rugged and lightweight (6.7 ounces) and nearly neutrally buoyant underwater, reducing jaw fatigue on extended dives. The extremely ligweight cover ring is machined from a solid piece of aircraft aluminum, and then hard anodized, utilizing a unique process to prevent corrosion. Patented Orthodontic Mouthpiece with High-Density Bite Tabs - To further reduce jaw fatigue, the Delta 4.2 features a patented Orthodontic Mouthpiece, designed to accommodate the natural overbite of the human jaw.Nitrox Compatibility - The Delta 4.2 is classified as being suitable for use with nitrox breathing gas mixtures containing up to 40% oxygen by volume without the need for special preparation, cleaning or component parts.FDX-10 Balanced Diaphragm First Stage - Forged from marine-grade brass, the FDX-10 features optimized air paths and angled hose ports for superior performance and comfort. A sealed Balanced Diaphragm design, Enviro Kit and patented DRT TM (Dry Regulator Technology) isolate all internal components from the environment. 2 high pressure and 4 low pressure ports allow convenient and comfortable hose routing.
 de plongée Oceanic Alpha 8 Black

58.36 EUR

Oceanic Alpha 8 Black



Oceanic Alpha 8 Black. Professional performance, entry-level price. If you believe that you shouldnt have to sacrifice performance for price, the Alpha 8 Sport is for you. The Alpha 8 Sport is the top-performing regulator in its class, and one of the most affordably priced regulators you can buy.Features:- The best price-to-performance ratio in its class- Designed to perform to the U.S. Navys Class A standards at 198 feet- Inexpensive to maintainSpecifications: - FEATURES & FUNCTIONS: ALPHA 8 SECOND STAGE- Valve Type: DEMAND- Adjustment- Balancing System- Integrated Purge Button: YES- Mouthpiece: ORTHODONTIC- Nitrox Compatibility: STANDARD TO 40%- Ambidextrous- Integrated Swivel- Weight (without hose): 6 OUNCES- Dimensions (front profile): 2.9 INCHES- First Stage Configurations: PX-2/SP-4- Minimum Cracking Effort: 1.1 CIW*- Factory Set Inhalation Effort: 1.2 - 1.4 CIW*- Work of Breathing: 1.23 JOULES (PX-3)1.47 JOULES (SP-5- FEATURES & FUNCTIONS: SP-5- Valve Type: UNBALANCED PISTON- Primary Material: MARINE BRASS- Low Pressure Ports: 4- High Pressure Ports: 1- Integrated Swivel- Nitrox Compatibility: STANDARD TO 40%- 300 BAR DIN Fitting: OPTIONAL- Sealed Valve Design- Environmental Protection- Weight: 26 OUNCES- Factory Set Intermediate Pressure: 140-145 PSI- Pressure Drop: 13 PSITechnology: Best Price / Performance ratio in its class:Not only is the Alpha 8 an economical buy for the diver on a budget, it is just as inexpensive to maintain. Standard replacement parts can cost as little as half of those in other regulators in its class.Patented orthodontic mouthpiece:To further reduce jaw fatigue, the Alpha 8 features a patented Orthodontic Mouthpiece, designed to accommodate the natural overbite of the human jaw.Nitrox Compatibility:The Alpha 8 is classified as being suitable for use with nitrox breathing gas mixtures containing up to 40% oxygen by volume without the need for special preparation, cleaning or component parts.SP-5 Sport Piston First Stage:The SP-5 offers all divers the opportunity to own a top-performing regulator at an unbeatable price. Repeatedly rated as the best in its class, the Alpha SP-5 exceeds both Navy Class A and European CE standards. The Alpha SP-5 may have been the first regulator you ever used due to its widespread use in rental and resort operations
 de plongée Oceanic Alpha 9 Without Hose Pink

75.18 EUR

Oceanic Alpha 9 Without Hose Pink



Oceanic Alpha 9 Without Hose Pink. We set out to make a “standard” regulator that was simple, dependable and economical. What we didn’t expect was that in tests it would outperform other high-end regulators. Not an easy feat for a “standard” downstream demand valve regulator. With the Alpha 9, you get effortless breathing in a compact design that is extremely tough yet easy to maintain and service.Features:- The best price-to-performance ratio in its class- Designed to perform to the U.S. Navys Class A standards at 198 feet- Inexpensive to maintain- Paired with our SP-5 Sport Piston First Stage with optional DVT (Dry Valve Technology)- Available with MaxFlex Hose which is a lightweight, flexible, Braided hose designed to outperform and outlive traditional rubber hosesSpecifications: - FEATURES & FUNCTIONS: ALPHA 9 SECOND STAGE- Valve Type: DEMAND- Adjustment- Balancing System- Integrated Purge Button: YES- Mouthpiece: ORTHODONTIC- Nitrox Compatibility: STANDARD TO 40%- Ambidextrous- Integrated Swivel- Weight (without hose): 6 OUNCES- Dimensions (front profile): 2.9 INCHES- First Stage Configurations: PX-2/SP-4- Minimum Cracking Effort: 1.1 CIW*- Factory Set Inhalation Effort: 1.2 - 1.4 CIW*- Work of Breathing: 1.23 JOULES (PX-3)1.47 JOULES (SP-5) - FEATURES & FUNCTIONS: SP-5- Valve Type: UNBALANCED PISTON- Primary Material: MARINE BRASS- Low Pressure Ports: 4- High Pressure Ports: 1- Integrated Swivel- Nitrox Compatibility: STANDARD TO 40%- 300 BAR DIN Fitting: OPTIONAL- Sealed Valve Design- Environmental Protection- Weight: 26 OUNCES- Factory Set Intermediate Pressure: 140-145 PSI- Pressure Drop: 13 PSITechnology: Best Price / Performance ratio in its class:Not only is the Alpha 9 an economical buy for the diver on a budget, it is just as inexpensive to maintain. Standard replacement parts can cost as little as half of those in other regulators in its class.Patented orthodontic mouthpiece:To further reduce jaw fatigue, the Alpha 9 features a patented Orthodontic Mouthpiece, designed to accommodate the natural overbite of the human jaw.Nitrox Compatibility:The Alpha 9 is classified as being suitable for use with nitrox breathing gas mixtures containing up to 40% oxygen by volume without the need for special preparation, cleaning or component parts.SP-5 Sport Piston First Stage:The SP-5 offers all divers the opportunity to own a top-performing regulator at an unbeatable price. Repeatedly rated as the best in its class, the Alpha SP-5 exceeds both Navy Class A and European CE standards. The Alpha SP-5 may have been the first regulator you ever used due to its widespread use in rental and resort operations