The Staple cylinder in the diving industry is the 80 Cubic Foot Aluminum Tank. This cylinder is used by more divers’ dive operators and retail dive stores than any other type of cylinder available. The Pro Valve is one of the highest flow cylinder valves available today and is also a convertible valve. Whether you dive Yoke or DIN regulators this valve will work for both. Valve has easily removed 200 bar (3000 psi) DIN insert to convert the valve for use with DIN regulators. Valve has a heavy duty deign with a smooth operating mechanism and multi-ported burst disc plug for added safety. Aluminum cylinders unlike steel cylinders don’t rust, they oxidize. The oxidization of aluminum forms a protective coat that hinders the continuation of corrosion making aluminum cylinders less likely to be condemned due to excessive corrosion. Cylinder measures (H x Dia.) 28.8″ x 7.25″ (73.2cm x 18.4cm), weighs 31.6 lbs. (14.33 kg) and is -1.8 lbs. (-816.5 g) when empty. Note: All Catalina cylinders are nitrox ready and meet certificated specifications of the US Department of Transportation (DOT) with DOT-3AL specification and Transport Canada Safety and Security (TC) with TC-3ALM specifications. Purchasers should check with other country requirements to know if the cylinders are certified for use in that country.