This Kegco 542-2 Pro Series Double Gauge Regulator works with any CO2 Tank with a CGA-320 valve, and measures both the PSI and the volume of CO2 gas in your cylinder. It has a Y splitter with two independent shut off valves that allows you to dispense a single keg or two separate kegs at the same pressure. This regulator is constructed of forged brass with all brass connections and components, a sintered brass inlet filter, integrated nylon tank connection washer (and a spare), and self resetting safety release valve. The top gauge lets you know how much CO2 pressure is in the keg and displays 0-60 psi, while the second gauge lets you know how much CO2 gas is left inside the CO2 tank and features a 0-2000 display. Both gauge displays have been designed to be easy to read. A large adjustment knob with a lock ring allows the gas flow to be easily changed without the need for a screwdriver. This regulator includes a tamper proof safety relief valve that release at 45 psi, as well as a shut off valve that can instantly shut off pressure ot the keg without backing up your gas line.