Product Details: Outfit your semi to be Ready for the Road Ahead™ with a seamless transfer of engine coolant to the heater core, with the Gates 1" x 50' Green Stripe® Heavy-Duty Heater Hose. With a specialized design, this replacement hose transports hot engine coolant to the heater core, where it is then used to blow warm air towards passengers in the cabin. Manufactured with a heat-resistant body to efficiently transfer fluids throughout a system. FleetPride is your First Click in Heavy Duty®.