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 will is mounted either at ones 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.
Depending on the type of diving you plan on doing will determine what capacity the redundant air supply needs to be. Leisure Pro offers 30 cubic feet (849.5 liters) size 3,000 psi (207 bar) bottles to meet your requirements. If you make deep technical dives, wreck penetration or cave-diving this 30 cu ft cylinder is what you're looking for. 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.
The Brushed finished (Sanded) cylinder has a 5.25" (13.3 cm) diameter and is 19.9" (50.5 cm) tall without the valve. The cylinder weighs 13.6 lbs (6.2 kg) and is -2.4 lbs (-1.9 kg) full, and from 500 to 0 psi (34.5 to 0 bars) -0.7 to -0.2 lbs (-0.32 to -0.10 kg). Cylinder is DOT-3AL & TC-3ALM designed, Manufactured from high strength aluminum alloy 6061-T6 and has Standard 3/4-14 NPSM threads.
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 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. When shipped the tanks valves will be removed and the tank will require re-inspection before being filled. All Catalina cylinders are nitrox Ready!