Gas Regulator, Regulator Supply Type Cylinder, Gas Service Acetylene, Oxygen, Stages Single Stage, Inlet Connection CGA-540 Oxygen/CGA-300 Acetylene, Outlet Connection 9/16 In. -18 RH Oxygen/9/16 In. -18 LH Fuel, Delivery Pressure Range 100 psi Oxygen/15 psi Fuel, Gauge Size 2 in, Supply Pressure Gauge 0 to 4000 psi Oxygen/0 to 400 psi Fuel, Max. Inlet Pressure 4000 psi/400 psi, Body Material Brass, Diaphragm Material Neoprene, Body Dia. 2 in, Includes Durable PTFE High-Pressure Seat. This item has been restricted from sale in the following state (s): []