Keeping you Ready for the Road Ahead™, the HD Value 5/16" Nylon Air Brake Tubing is made of durable virgin nylon to maintain the necessary fixed connection between couplings during vehicle operation. This flexible abrasion and kink resistant air brake system tubing meets and/or exceeds SAE J844 and DOT FMVSS 49 CFR 571.106 requirements. This heavy duty air brake hose offers excellent UV stability and resists oil, grease, gasoline, diesel fuel, road salts, and moisture. FleetPride is your First Click in Heavy Duty®.