Gas Regulator, Regulator Supply Type Cylinder, Gas Service Carbon Dioxide, Stages Single Stage, Inlet Connection CGA-320, Outlet Connection 5/8 In. -18 RH Internal, Delivery Pressure Range 0 to 150 psi, 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 Bright Nickel-Plated Bonnet, Sure Seat (TM) Filtered Seat, Standards UL Listed, Regulator Application General Purpose