Update your semi with a secure transfer of essential fluids throughout the cooling system, with the Tru-Flex 3" x 25' Medium Duty Galvanized Flex Hose that ensures you're Ready for the Road Ahead™. To transfer coolant from the radiator to the engine to reduce heat and optimize motor performance, this replacement hose features a flexible design. Fashioned with exceptional durability and improved bending strength to deliver a long service life, this flex hose also can be used on other systems including exhaust, air intake, and hydraulic systems. FleetPride is your First Click in Heavy Duty®.