Uniweld H32BT Oxy/LP Twin Welding Hose, 12.5-Feet X 3/16-Inch Proudly Made In USA Oxy/LP Twin Welding Hose 12.5 Ft. X 3/16 Inch I.D B Fitting Connection (B=9/16 Inch - 18) Flexible Grade T twin welding hose is color coded; Green for Oxygen and Red for LP Fuel Gas 8 sided crimp ferrules