Keeping you Ready for the Road Ahead , the Tramec 3/8" Rubber Air Brake Hose is made specifically for the trailer air brake system maintaining the necessary fixed connection between couplings during vehicle operation. This hose is made from a blend of synthetic rubber and nylon fibers, which gives it excellent resistance to abrasion, ozone, and weathering. With a reinforced inner tube, this hose is kink-free, preventing collapsing under pressure. This hose not only meets SAE J1402A and DOT FMVSS 106 requirements, but also provides the heavy duty resistance you need in an air brake hose. FleetPride is your First Click in Heavy Duty