High Purity Gas Regulator Mounting Type Cylinder Number of Stages Two Stage Compatible Gas Type Acetylene Control Type Knob Maximum Inlet Pressure 3 500 psig Inlet Connection Size 0.885 In.-14 Inlet Connection Gender Female Inlet Connection Type NGO Inlet Thread Direction Left Hand Outlet Pressure (Maximum) 15 psig Outlet Connection Gender Male Outlet Connection Size 9/16 In.-18 Outlet Thread Direction Left Hand Gas Purity Rating 99.9 Percent