Genuine OEM Ford Thermostat Housing Tube Hose, part number 1111839. This hose serves as a conduit within the engine's cooling system, typically connecting the thermostat housing to other parts of the cooling circuit. It is constructed from high-quality, heat-resistant rubber to withstand engine temperatures and coolant flow. Genuine OEM parts are manufactured to exact specifications, ensuring a leak-free fit and maintaining the integrity of the cooling system for optimal engine performance.