A diving cylinder, scuba tank or diving tank is a gas cylinder used to store and transport high pressure breathing gas as a component of a scuba set. It provides gas to the scuba diver through the demand valve of a diving regulator.
Diving cylinders typically have an internal volume of between 3 and 18 litres (0.11 and 0.64 cu ft) and a maximum pressure rating from 200 to 300 bars (2,900 to 4,400 psi). The internal cylinder volume is also expressed as “water capacity” – the volume of water which could be contained by the cylinder. When pressurized, a cylinder carries a volume of gas greater than its water capacity because gas is compressible. 600 litres (21 cu ft) of gas at atmospheric pressure is compressed into a 3-litre cylinder when it is filled to 200 bar. Cylinders also come in smaller sizes, such as 0.2, 1.5 and 2 litres, however these are not generally used for breathing, instead being used for purposes such as Surface Marker Buoy, drysuit, buoyancy compensator inflation and spare air systems.
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Perfect compact size to fit in your pocket, save-a-dive kit or dive bag.
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Compatible with both standard and DIN Regulators
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FREE SHIPPING IN THE USA This is the upgraded Spare Air Emergency Dive Tank Nitrox System
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FREE SHIPPING IN THE USA This is the Spare Air Tank 1.7 3.0 and 6.0 Emergency Rescue Kit::UpGraded
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FREE SHIPPING IN THE USA The Original Spare Air Xtreme size - the smallest, most compact tank we make! Perfect for most water emergencies where just a few extra breaths will make the difference.
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Stay down longer on your dives with these twin tank mounting bands
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FREE Shipping does not apply to these tanks in the USA CONTACT US FOR SHIPPING RATES...BOTH CANADA AND THE USA 3300 PSI Dive Tank Sherwood Dive Products:::Quality Dive Gear at Affordable Prices
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You spend a lot of money on your gear. Keep track of it with this great paint marker
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For every diver who ever took his or her gear on a dive boat or a crowded beach, this product was made for you. Fastencil, with its durable underwater paint and beautiful professional silkscreen look will let you protect, identify and label your gear with style! Finally, you don't have to graffiti your stuff with felt tip markers or messy paint bottles.
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FREE SHIPPING IN THE USA Vital in ensuring a safe and stress free diving experience for Nitrox divers.
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Cam bands for securing various sized tanks.
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This product extends air hose life, use to identify each hose. There are many colors to choose from and they fit most scuba diving air hoses. Provides color enhancement and protects hoses from abrasion
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Afford to dive with Trident
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The Vindicator was designed to be an easy to read visual safety device to prevent divers from starting a dive with their air turned partially on or turned off completely. With 9 different sized models, the Vindicator is easily retrofitted to most valves on the market. The Vindicator is an easy way to reassure yourself and fellow divers whether your air is turned on or off. Perfect for individual divers, rental departments, dive charters and open water instruction
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Safely transport tanks in your car without them rolling around in your trunk with this handy PVC tank holder.
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Protect that expensive tank valve and important o-ring with this awesome cap
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Great for blowing off work areas, inflating mattresses, inner tubes, etc.
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Protect your gear and keep your tanks from rolling around with this Hex Rimmed tank boot.
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This handy accessory attaches to any standard BCD hose fitting allowing you to inflate your tire, innertube, buoy, etc. virtually anything with a standard tire inflator nozzle, using your air tank!
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Safely transport your tanks in your vehicle or boat, save your tanks and expensive scuba gear. A fantastic value
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This simple yet effective kit allows quick and tidy set up of a stage bottle to be carried along side the torso. Neoprene band with pull tab and anti-slipping material (cylinder side) keeps hoses tidily arranged until required. Heavy duty stainless steel pipe band is enclosed in a dedicated nylon sleeve to protect the cylinder’s exterior finishing.
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The Quick Draw Pony Bottle Holder Kit allows you easy access to your Emergency Air with a quick pull of a pin.
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Attach the firefly to your tank and be seen with this bright little beacon on night dives or other low light situations.
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FREE SHIPPING IN THE USA Enjoy the advantage of a higher cylinder pressure that DIN regulators provide? Make the switch affordably with Atomics Yoke to DIN Conversion Kit.
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Stage bottle rigging for secondary bottles with a diameter of 7.25".
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Whether missing a LP Port Plug for your regulator or if you just could use one in your save-a-dive kit?
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Have all the rescue gear you need and still afford to dive!
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Afford to dive!
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Afford to dive
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This is an inexpensive way to protect that expensive tank valve
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Protect your expensive steel tank
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This great sherwood reliable 63 cubic foot aluminum tank is GREAT for most diving needs, and is little smaller than the traditional 80 cu ft tank.