Uniweld H11B Acetylene Single Hose, 6-Feet X 3/16-Inch Proudly Made In USA Acetylene Single Hose 6 Ft. X 3/16 Inch I.D B Fitting Connection (B=9/16 Inch - 18) Flexible Grade R single hose is color coded Red for Acetylene Fuel gas with left hand thread fittings to prevent improper hose connection 8-sided crimp ferrules capable of withstanding a maximum W.P. of 200 psi