Catalina 100 cu ft (13.2 liter) cylinder with K Pro Valve, the K 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. 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. All Catalina cylinders are nitrox Ready. The Catalina 100 cu ft (13.2 liter) cylinder has an 8" (203.2 mm) diameter weighs 46.2 lbs (21 kg) when empty is 27.3" (693 mm) tall without the valve and its buoyancy when full is -7.8 lbs (-3.54 kg). The cylinder never becomes positive retaining a -0.4 lb (-0.18 kg) buoyancy characteristic when completely empty. This allows the diver who uses a standard aluminum 80 cut ft (11.1 liter) cylinder to lower the required amount of lead on their belt or BCD pockets by over 4 lbs (1.81 kg), and gives them approximately 20 cu ft (3 liters) additional air for each dive. When shipped the tanks valves will be removed and the tank will require re-inspection before being filled.