Solid Brass Oxygen and Acetylene Regulators 4 Welding Victor Gas Torch Cutting Used for Portable tanks( NOT FULL sized ) Hose connection size B Oxygen Inlet - 0-4000 PSI Outlet 0-1000 Acetylene 2" diaphragm pressure range 0-15 Threads: Acetylene 1/2" out put 5/8" in put Threads: Oxygen output 1/2" input 7/8"