Genuine OEM Volkswagen A/C Refrigerant Line, part number 2Q0816721D. This line transports refrigerant within the air conditioning system, connecting components like the compressor and condenser. It is a flexible hose, weighing approximately 0.18 kg and measuring 0.56 meters in length. Using a genuine OEM line ensures precise fitment, correct material composition for refrigerant compatibility, and long-term durability under varying pressure and temperature conditions.