This product is a genuine BMW seal designed for the door seam on the rear right side of the vehicle's roof. It is part number 51357179124 and is used to ensure a tight and secure seal between the door and the roof, preventing any water or debris from entering the vehicle. This seal is specifically designed for BMW vehicles and is made with high-quality materials to ensure durability and longevity. It is an essential component for maintaining the integrity of the vehicle's structure and protecting the interior from the elements.