The Genuine BMW Roller Sun ScreenTriangular Window Left - 51357129811 is a high-quality sun shade designed specifically for BMW vehicles. It is a triangular-shaped screen that attaches to the left side window of the car and can be easily rolled up or down. The sun screen is made of durable materials and features a sleek design that blends seamlessly with the interior of the car. It effectively blocks out sunlight and UV rays, providing protection for passengers and preventing the car's interior from getting too hot. This product is an authentic BMW part and is guaranteed to fit and function perfectly in your vehicle.