This is a genuine BMW finisher window frame for the top of the rear right door. It has a glossy black finish and the part number is 51357377886. It is a high-quality product made by BMW and is designed to fit perfectly on your vehicle. This finisher window frame adds a sleek and stylish touch to your car's exterior, while also providing protection for the window. It is a durable and reliable product that will enhance the overall look of your BMW.