Uniweld RHP800 Nitrogen Regulator with 0-800 psi Delivery Pressure, 2" Nitrogen Regulator, Delivery Pressure 0-800 PSI CGA580 Inlet Connection, 1/4 Inch Male Flare Outlet Connection and Easy to Read 2 Inch Gauges with Protective Rubber Gauge Boots Durable brass piston designed diaphragm, self re-seating relief valve (not designed to protect downstream system) Large brass Tee Handle with stainless steel pressure adjusting screw and regulator bushing that prevents galling Regulator can be used with CO2 with the Uniweld part no F36 adaptor, CO2 Cylinder (CGA320) to Nitrogen Regulator (CGA580) (purchased separately)