ACDelco 31735 Specialty Premium Formable Coolant Hose: Automotive. Buy ACDelco 31735 Specialty Premium Formable Coolant Hose: Connector - ✓ FREE DELIVERY possible on eligible purchases. Inside hose diameter remains constant from end to end. No convolutions inside of the hose so tube is smooth, allowing coolant to flow freely . Comes with protective sleeves to help duplicate GM OE designs for proper fit and function . Extra strength fabric reinforcement with helical steel wire spiral molded between the tube and cover provides excellent flexibility as well as collapse and kink resistance . Heat resistant construction throughout for increased durability . EPDM rubber tube and neoprene cover for extended service life . Specialty Premium Formable Coolant Hoses are heavy duty, flexible, constructed with EPDM rubber, and designed to replace straight or curved coolant hoses enabling maximum coverage with minimum inventory. They are composed of specially blended materials to help resist electrochemical degradation (ECD), the leading cause of hose failure. Specialty Premium Formable Coolant Hoses are temperature rated from -40 degrees Fahrenheit to 257 degrees Fahrenheit (-40 degrees Celsius to 125 degrees Celsius) and are approved for Marine applications. Do not use for fuel or oil transfer applications. . . .