Air Rubber hose Car Heater Radiator Coolant Hose A rubber hose is a flexible tube made of rubber that is used to transport fluids, such as coolant or radiator fluid, in various applications. In the context of a car heater or radiator, a rubber hose is used to transfer hot coolant or radiator fluid from the engine to the heater core or radiator, and then back to the engine.These radiator hoses are designed to withstand high temperatures and pressure, as well as the chemicals and additives found in coolant or radiator fluid. They are typically made of EPDM (ethylene propylene diene monomer), which provides excellent resistance to heat, ozone, and weathering. They often have reinforced layers, such as polyester or aramid fibers, to enhance their strength and durability. An extra-strong yarn reinforcement gives this hose excellent durability to handle high pressures. In summary, rubber hoses for car heater or radiator applications are essential components that help to transfer h…