Regulator, Single Stage, High Purity, Analytical, High Pressure, Cylinder Gas Any Inert, Helium, Argon, Nitrogen, CGA Connection Inlet 580, CGA Connection Outlet Chrome Needle Valve with 1/8 In Brass Tube Fitting, Delivery Pressure Range 0 to 15 PSI, Gauges Delivery Pressure 30 In Hg to 0 to 30 PSIG, Inlet Gauge 0 to 4000 PSI, Gauge Size 2.5 In, Body Dia 2.0 In