FleetRunner Hi-Temp Straight Coolant Hose is specifically designed for heavy-duty applications, trucks, buses and off-road equipment. Engineered with an advanced peroxide-cured EPDM material to provide an exceptionally high temperature rating of up to +300 Deg. F. Tested in the toughest fleets and with an OE -quality fit, form and function that stands up to the most demanding driving environments.