Kegco's HL-62 Premium Dual Gauge CO2 Draft Beer Regulator works with any CO2 tank with a CGA-320 valve and measures PSI, as well as the volume of the CO2 gas in the cylinder. The second gauge indicates how much CO2 is left in the cylinder and when it should be refilled. The large adjustment knob allows you to make quick and accurate adjustments by hand and turns effortlessly, even in freezing temperatures. The Kegco Three-Way Air Distributor is made of aluminum and features two in-line shut offs and built-in mounting holes for convenient mounting.