Dayco's straight radiator hoses feature knitted reinforcement and synthetic EPDM construction. They meet SAE J20R4, Class D-2 requirements and provide high strength and resistance to ozone and other detrimental environmental elements and coolants. They can also withstand temperature variations from -40 degrees F (-40 degrees C) to +257 degrees F (+125 degrees C). Dayco straight radiator hoses are not suitable for fuel or oil transfer.