Specialty Gas Lab Regulator, Regulator Supply Type Cylinder, Gas Service Argon, Helium, Nitrogen, Stages Two Stage, Inlet Connection CGA-580, Outlet Connection 1/4 in FNPT Diaphragm Valve with 1/4 in Tube Fitting, Delivery Pressure Range 0 to 125 psi, Gauge Size 2 in, Supply Pressure Gauge 4, 000 psi, Max. Inlet Pressure 3, 000 psi, Body Material Brass, Diaphragm Material 316L Stainless Steel, Body Dia. 2.0 in, Includes Diaphragm Valve and 1/4 in Swagelok Fitting, Standards CGA E-4