For your extremely high temperature radiator, heater, and coolant transfer applications, Gates Straight Silicone Coolant Hose is engineered with extra long-lasting silicone rubber for extreme ambient and radiant temperature conditions. The Silicone tube and cover resist prolonged exposure to under-hood and coolant heat, weathering, ozone, and deterioration. Use Gates thermoplastic clamps or silicone hose clamps to complete your assembly.