Constructed with silicone rubber. Ideal for extremely high temperature service in radiator, heater and other coolant transfer hose applications. Approved for marine applications.Reinforced with tough, high temperature resistant polyester textile cords.Exceptionally flexible.Highly resistant to weathering, coolant deterioration, ozone and temperature extremes.Exceeds SAE 20R3 Class A Tube and Cover.Can be used for emission hose applications.For proper installation, use Gates PowerGrip SB clamps or Gates silicone hose clamps.Temperature Rating: -70 Deg. F to +400 Deg. F (-57 Deg. C to +204 Deg. C).Caution: Do not use for fuel or oil transfer applications.Gates - Driven By Possibility.