The Dayco 5.87" Radiator Hose is designed to provide superior performance and reliability. This hose is constructed from a synthetic EPDM rubber that provides high strength and resistance to oil, mud, ozone and coolants. The inner base tube is reinforced with knitted rayon for maximum strength and burst resistance for the life of the hose. This hose meets SAE J20R4, Class D-1 requirements for coolant and heater hoses. This hose is designed to provide a secure and reliable connection for your vehicle's cooling system. FleetPride is your First Click in Heavy Duty®.