Straight fitting: ISO9001:2000,TS16949:2009,CCC certificate Straight connector,Straight fitting,Auto fittings 1).Material: PA, Nylon ,Polyamide ... and reliable. 6).Application: Fluid air,water, oil. Air brake systems Fuel lines; Instrumentation compressed air lines; Low pressure hydraulic ... PA (Polyamide, Nylon) TubeTube-- PU (Polyurethane) TubeTubing -- PU (Polyurethane) air brake coils, spiral hose