Specialty Gas Regulator Regulator Supply Type Cylinder Gas Service Argon Helium Nitrogen Stages Single Stage Inlet Connection CGA-580 Outlet Connection 1/4 in NPT x 1/4 in Stainless Steel Tube Fitting Delivery Pressure Range 0 to 1500 psi Gauge Size 2 1/2 in Supply Pressure Gauge 4 000 psi Max Inlet Pressure 3 000 psi Body Material Brass Diaphragm Material Urethane Body Dia 2.0 in Includes Harris Model 8700 Single Stage Regulator Standards CGA E-4