Genuine OEM Audi A/C Refrigerant Line, part number 7L6820721BF. This flexible hose is an integral part of the vehicle's air conditioning system, responsible for transporting refrigerant between various components. It ensures the efficient circulation of refrigerant, which is essential for the cooling and dehumidifying process. The line features robust construction with durable rubber hose sections and secure metal fittings at each end. Using a genuine OEM refrigerant line ensures correct pressure ratings, proper routing, and leak-free connections, preventing costly refrigerant loss and A/C system damage.