This product is a genuine BMW finisher for the window frame on the B-pillar of the rear left door. It is finished in a glossy black color and has a part number of 51357207835. This finisher is designed specifically for BMW vehicles and is made with high-quality materials to ensure a perfect fit and long-lasting durability. It is a direct replacement for the original finisher and is an essential component for maintaining the sleek and stylish appearance of your BMW.