Uniweld H11 Acetylene Single Hose 6 Ft. X 3/16 Inch I.D. with (A) Size Fitting Connections. Flexible Grade R single hose is color coded Red for Acetylene Fuel gas with left hand thread fittings to prevent improper hose connection for your safety. Eight-sided crimp ferrules capable of withstanding a maximum W.P. of 200 psi for reliability and long work life.