Gas Switchover System Compatible Gas Type Hydrogen CGA Number CGA 350 Maximum Inlet Pressure 3 000 psig Outlet Pressure (Maximum) 125 psig Outlet Connection Size 1/4 in Outlet Connection Type NPT Inlet Connection Size 0.825 In.-14 Inlet Connection Type NGO Inlet Thread Direction Left Hand Body Finish Chrome Plated Body Material Brass Application Cutting Welding Control Type Knob