High Purity Gas Regulator, Mounting Type Cylinder, Number of Stages Single Stage, Compatible Gas Type Breathing Air, Control Type Knob, Maximum Inlet Pressure 3,500 psig, Inlet Connection Size 0.825 In.-14, Inlet Connection Gender Female, Inlet Connection Type NGO, Inlet Thread Direction Right Hand, Outlet Pressure (Maximum) 50 psig, Outlet Connection Gender Male, Outlet Connection Size 1/4 in, Outlet Connection Type NPT, Gas Purity Rating 99.9 Percent