Great size for primary child’s cylinder or instructional pool cylinder, Catalina 53 cu ft (8 liter) Aluminum Tank with Pro Valve. Cylinder comes with a K Pro Valve, which 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. The K Pro Valve is nitro x compatible up to 40%.