Genuine OEM Audi A/C Refrigerant Line, part number 4H0260710Q. This line is a critical component of the air conditioning system, responsible for transporting high-pressure refrigerant between major components like the condenser and compressor. Its precise routing and connections ensure efficient heat exchange and system integrity. Choosing a genuine OEM line guarantees the correct material composition, pressure rating, and exact routing geometry for a leak-free and reliable A/C system.