Gas Regulator, Regulator Supply Type Cylinder, Gas Service Acetylene, Stages Single Stage, Inlet Connection CGA-510, Outlet Connection 9/16 In. -18 LH B, Delivery Pressure Range 15 psi, Gauge Size 2 1/2 in, Supply Pressure Gauge 400 psi, Max. Inlet Pressure 400 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): []