The Genuine BMW Finisher Window Frame B-Pillar Fl Door (Black) - 51337179419 is a replacement part for BMW vehicles. It is designed to fit the B-pillar area of the front left door and is finished in black. This finisher helps to provide a clean and seamless look to the window frame, while also protecting it from wear and tear. It is an authentic BMW product, ensuring high quality and perfect fit for your vehicle. This finisher can be easily installed and is a great option for replacing damaged or worn out parts.