This product is a genuine BMW gasket for the rear light of the trunk lid on the left side. The part number is 63217225241. It is used to create a seal between the rear light and the trunk lid, ensuring proper fit and function. This gasket is specifically designed for BMW vehicles and is made with high-quality materials for durability and longevity. It is an essential component for maintaining the integrity of the trunk lid and ensuring the safety of the vehicle's lighting system.