The Genuine BMW Finisher Window Frame B-Pillar Rr Door (Gloss Black) - 51357207836 is a replacement part for the window frame on the rear door of a BMW vehicle. It is made by the original manufacturer, BMW, and is designed to match the original finish and color of the vehicle. This finisher is specifically for the B-Pillar on the rear door and has a glossy black finish. It is a high-quality, genuine BMW product that is durable and long-lasting. This finisher is essential for maintaining the appearance and integrity of the vehicle's window frame. It can be used as a direct replacement for the original part and is suitable for use in other API calls.