Gas Regulator, Regulator Supply Type Cylinder, Gas Service Nitrogen, Stages Single Stage, Inlet Connection CGA-580, Outlet Connection 5/8 In. -18 RH Internal, Delivery Pressure Range 275 psi, Gauge Size 2 1/2 in, Supply Pressure Gauge 4, 000 psi, Max. Inlet Pressure 3, 500 psi, Body Material Brass, Diaphragm Material Stainless Steel, Body Dia. 3.25 in, Includes External Relief Valve, Nickel-Plated Bonnet, Standards UL Listed, Regulator Application General Purpose. This item has been restricted from sale in the following state (s): []