Nitrogen Regulator, Delivery Pressure 0-400 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)