Uniweld H32AB Oxyacetylene Twin Welding Hose, 12.5-Feet X 3/16-Inch Proudly Made In USA Oxyacetylene Twin Welding Hose 12.5 Ft. X 3/16 Inch I.D A Fitting Connection (A=3/8 Inch - 24) X B Fitting Connection (B=9/16 Inch - 18) Flexible Grade R twin welding hose is color coded; Green for Oxygen and Red for Acetylene Fuel Gas 8-sided crimp ferrules capable of withstanding a maximum W.P. of 200 psi