Specialty Gas Regulator, Regulator Supply Type Cylinder, Gas Service Carbon Dioxide, Stages Single Stage, Inlet Connection CGA-320, Outlet Connection 1/4 In. FNPT Diaphragm Valve with 1/4 In. Tube Fitting, Delivery Pressure Range 0 to 50 psi, Gauge Size 2-1/2 In., Supply Pressure Gauge 4000 psi, Max. Inlet Pressure 3500 psi, Body Material Brass, Diaphragm Material Neoprene, Body Dia. 2.000 In., Regulator Application General Purpose