Gas Regulator, Regulator Supply Type Cylinder, Gas Service Nitrogen, Stages Single Stage, Inlet Connection CGA-580, Outlet Connection 7/16 In. -20 Flared, Delivery Pressure Range 450 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 Nylon Knob, Standards UL Listed, Regulator Application HVAC. This item has been restricted from sale in the following state (s): []