Genuine OEM Volkswagen O-Ring, part number WHT008798B. This circular seal is used to prevent leakage between mating surfaces, specifically within the turbocharger and exhaust gas recirculation system. The O-ring has a diameter of 0.013 meters and a thickness of 0.002 meters. Genuine OEM O-rings are crucial for maintaining the integrity of fluid and gas systems, ensuring optimal performance and preventing leaks.