This Sidearm 4012P regulator is designed to fit all paintball-style tank valves (#323). It is compatible with CO2, N2, and HPA bottles and offers a pressure range of 0-400 PSI. If you are designing an air system that needs to be compact and high pressure this is the regulator to use. The dual gauges show your inlet pressure and set outlet pressure. The large knurled knob features a tight rubber seal to keep guts and threads clean while making sure the set pressure stays put even in racecar conditions. The outlet coupler sits in a 1/4" NPT port so it can be removed and replaced with an AN fitting if needed. This is the regulator that is used in the Jet Pak 3. Limited Lifetime Warranty.