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 8 cubic foot tank is an ideal volume cylinder for use as a pony or argon bottle, redundant air supply system, bailout or short duration decompression/safety stop gas supply or with argon for use with a dry suit for insulation needs while cold-water diving.
A pony bottle is a smaller tank, which is carried in addition to the main tank. It possesses its own regulator with first and second stage and sometimes a separate pressure gauge. It is mounted either at one's side or in front of the body or fixed to the main tank. A pony bottle scuba tank is the only true redundant breathing mechanism you can completely rely on. When used for argon gas the first stage has a low-pressure BCD type hose for attachment to the dry suit inlet valve.
The 8 cubic foot pony/argon bottle has a 2015 psi (139 bar) service pressure rating, a capacity of 7.6 cu. ft. (1.5 liters), is negative 1.5 lbs. (0.68 kg) when full and is negative 2 lbs. (0.9 kg) at 500 psi (35 bars). Cylinder weighs 3.8 lbs. (1.72 kg) when empty, and measures (Dia. x L) 4.38" x 10.8" (111mm x 274mm).
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. When shipped the tanks valves will be removed and the tank will require re-inspection before being filled.