Industrial Gas Regulator Single Stage SR250D Cylinder Gas Oxygen CGA Connection Inlet 540 CGA Connection Outlet 9/16 In.-18 M RH Delivery Pressure Range 5 to 125 psig Gauges Delivery Pressure 200 psig Inlet Gauge 4000 psig Gauge Size 2 In. Overall Length 6-3/8 In. Flow Rate Approximately 5900 SCFH Material Forged Brass Outlet Connection 9/16 In.-18 M RH