Medium/Heavy Duty Regulator,Single Stage, 2" Gauges, CGA 580 Inlet, 9/16" - 18 RH Outlet with 1/4" Male Flare Outlet Adaptor and Hose Barb Outlet Adaptor , Body: Forged brass, Bonnet: Powder Coating, UV resistant Composite Knob, Inlet pressure: 3,000 psi, Outlet pressure: 0 to 145 psi.