Gas Regulator, Maximum Gauge Outlet Pressure 4,000 psig, Number of Stages Single Stage, Compatible Gas Type Oxygen, Control Type Knob, Inlet Connection Type NGO, Inlet Connection Gender Male, Inlet Connection Size 0.825 In.-14, Outlet Pressure (Maximum) 145 psig, Outlet Connection Gender Male, Outlet Connection Size 9/16 In.-18, Outlet Connection Type UNF, Body Material Brass, Body Finish Chrome Plated, Diaphragm Material Fiber Reinforced Neoprene, CGA Number CGA 540