Genuine OEM Audi A/C Refrigerant Line, part number 5Q0816721E. This hose is a critical component of the air conditioning system, responsible for transporting refrigerant between various components. It ensures the efficient circulation of refrigerant, enabling the system to cool the cabin effectively. Weighing 0.198 kg, it is constructed from materials resistant to refrigerant chemicals and high pressures. Using a genuine OEM refrigerant line guarantees correct routing geometry, leak-free connections, and material compatibility, crucial for maintaining A/C system integrity and performance.