Dayco 80270 50' 1/2" Heater Hose Specifically designed to be compatible with all common coolants and coolant additives Constructed using all EPDM compounds and spiral reinforcements Similar to SAE 20R3, Class D-2 Has a high burst strength and excellent heat resistance of -40 degrees Fahrenheit (-40 degrees Celcius) to +257 degrees Fahrenheit (+125 degrees Celcius) Limited Three Year Warranty