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The XS Scuba Metal Impact Aluminum SCUBA tanks are durable, reliable, and visually appealing. The tank is manufactured from the industry standard lightweight, high-strength aluminum 6061-T6 alloy. 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 80 cubic foot bottle has a 3000 psi (207 bar) service pressure rating, a capacity of 77.5 cu. ft. (11.1 liters), is negative 1.5 lbs. (0.7 kg) when full and is positive 3.3 lbs. (1.5 kg) at 500 psi (35 bars). Cylinder weighs 31.9 lbs. (14.5 kg) when empty, and measures (Dia. x L) 7.25" x 26.1" (184mm x 663mm). Aluminum cylinders unlike steel cylinders dont 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. When shipped the tanks valves will be removed and the tank will require re-inspection before being filled. Note:All Metal Impact Aluminum cylinders are nitrox ready up to 40% 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. XS Scubas Valves are designed and manuf