This product is a genuine BMW finisher for the window frame on the top of the front driver's side door. It is made of chrome and has the part number 51337174388. It is a high-quality replacement part for BMW vehicles and is designed to fit perfectly and function just like the original part. This finisher adds a sleek and stylish touch to the window frame, enhancing the overall appearance of the vehicle. It is a durable and reliable product that is built to last.