Genuine OEM Volkswagen Refrigerant Pipe, part number 5WA816721B. This pipe is a critical component of the vehicle's air conditioning system, responsible for transporting refrigerant between system components. It is part of the A/C system. The pipe is made from materials designed to withstand refrigerant pressure and temperature fluctuations. Genuine OEM parts are essential for refrigerant lines to ensure proper sealing, correct flow dynamics, and long-term reliability of the air conditioning system.