Specialty Gas Regulator, Single Stage, Harris Model 8700, Cylinder Gas Ar/He/N, CGA Connection Inlet 680, CGA Connection Outlet 1/4 In. NPT Outlet with stainless steel 1/4 In. Tube Fitting, Delivery Pressure Range 0-3000 PSI, Gauges Delivery Pressure 4000 PSI, Delivery 0-3000 PSI, Inlet Gauge 4000 PSIG, Gauge Size 2-1/2 In., Body Dia. 2 In., Overall Length 7-7/16 In., Includes Harris Model 8700 Single Stage Regulator, Flow Rate Cv - .08, Material Brass