Specialty Gas Regulator, Single Stage, Harris Model HP721, Cylinder Gas Ar/He/N, CGA Connection Inlet 580, CGA Connection Outlet Diaph. Valve 1/4 In. FNPT, 1/4 In. Tube Fitting, Delivery Pressure Range 0-15 PSI, Gauges Delivery Pressure 30 PSI, Delivery 0-15 PSI, Inlet Gauge 4, 000 PSIG, Gauge Size 2 In., Body Dia. 2 In., Overall Length 5-5/8 In., Includes Diaphragm Valve and 1/4 In. Swagelok Fitting, Flow Rate Cv - .08, Material Brass, Outlet Connection 1/4 In. Tube Fitting