High Purity Gas Regulator, Mounting Type Cylinder, Number of Stages Two Stage, Compatible Gas Type Hydrogen, Methane, Control Type Knob, Maximum Inlet Pressure 4,350 psig, Inlet Connection Size 0.825 In.-14, Inlet Connection Gender Male, Inlet Connection Type NGO, Inlet Thread Direction Left Hand, Outlet Pressure (Maximum) 125 psig, Outlet Connection Gender Female, Outlet Connection Size 1/4 in, Outlet Connection Type NPT, Outlet Thread Direction Right Hand, Gas Purity Rating 99.9999 Percent