Genuine OEM Audi A/C Refrigerant Line, part number 1K0820721BK. This component is responsible for transporting high-pressure refrigerant between various parts of the vehicle's air conditioning system, such as the compressor, condenser, and evaporator. It is essential for the efficient cooling and dehumidification of the cabin. Constructed from durable metal with a sealing O-ring, it measures approximately 0.59 meters in length. Using a genuine OEM refrigerant line ensures precise routing geometry, proper sealing, and resistance to high pressures and temperatures, preventing refrigerant leaks and maintaining optimal A/C system performance.