Genuine OEM Audi A/C refrigerant line, part number 424260704D. This pipe is a critical component of the air conditioning system, responsible for transporting refrigerant between the system's heat exchangers. It is constructed from high-grade metal tubing designed to withstand the specific pressures and temperatures of the A/C circuit. Genuine OEM lines feature the correct routing geometry and factory-sealed fittings to prevent refrigerant leaks and ensure optimal system efficiency.