Flow Gauge Regulator, Regulator Supply Type Cylinder, Gas Service Argon, Stages Single Stage, Inlet Connection CGA-580, Outlet Connection 5/8 In. -18 RH Internal, Delivery Pressure Range 50 cfh, Gauge Size 2 in, Supply Pressure Gauge 4, 000 psi, Max. Inlet Pressure 3, 500 psi, Body Material Brass, Diaphragm Material Neoprene, Body Dia. 2.0 in, Includes Nickel-Plated Bonnet, Self Reseting Safety Relief Valve, Sure Seat (TM) Filtered Seat, Standards UL Listed, Regulator Application General Purpose. This item has been restricted from sale in the following state (s): []