The Genuine BMW Roller Sun ScreenTriangular Window Left (Black) - 51357071111 is a triangular-shaped sun shade designed specifically for the left side window of a BMW vehicle. It is made of high-quality materials and features a sleek black color. The sun screen can be easily rolled up or down, providing protection from the sun's rays and helping to keep the interior of the car cool. It is an authentic BMW product and is designed to fit perfectly in the left side window of compatible BMW models.