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.