Specialty Gas Regulator, Regulator Supply Type Pipeline, Gas Service High Purity Non-Corrosive Gas, Stages Single Stage, Inlet Connection 1/4 in FNPT, Outlet Connection 1/4 in FNPT, Delivery Pressure Range 0 to 125 psi, Gauge Size 2 in, Max. Inlet Pressure 3, 000 psi, Body Material Brass, Diaphragm Material Stainless Steel, Body Dia. 2.125 in, Includes Rear Panel Mounting Threads, Standards CGA E-4, Regulator Application Laboratory