Specialty Gas Regulator, Maximum Gauge Outlet Pressure 4,000 psig, Number of Stages Two Stage, Compatible Gas Type Argon, Helium, Nitrogen, Control Type Knob, Inlet Connection Type NGO, Inlet Connection Gender Male, Inlet Connection Size 0.965 In.-14, Outlet Pressure (Maximum) 125 psig, Outlet Connection Gender Male, Outlet Connection Size 1/4 in, Outlet Connection Type NPT, Body Material Brass, Body Finish Chrome Plated, Diaphragm Material Neoprene, CGA Number CGA 580