Continental Elite 63990 Molded Heater Hose Goodyear Engineered Products are now branded Continental Elite Designed to transfer glycol-based coolants to and from the heater core, by-pass to the radiator, as well as through other components in the vehicles coolant system Original configurations available to ensure proper fit EPDM tube and cover with synthetic knit reinforcement Compatible with most coolants including ethylene glycol and propylene glycol-based coolants, as well as organic acid modified, long-life coolants