This product is a genuine Porsche Mass Air Flow Sensor O-Ring, with part number 99970108940. It is designed to fit and seal the mass air flow sensor in Porsche vehicles. The O-ring is made of high-quality materials to ensure a secure and long-lasting fit. It is an essential component for the proper functioning of the mass air flow sensor, which measures the amount of air entering the engine. This product is an OEM part, ensuring the highest level of quality and compatibility with Porsche vehicles.