The Genuine BMW Cross Rail Cap - 82792406093 is a small plastic cover designed to fit onto the cross rails of a BMW vehicle. It is used to cover and protect the mounting points of the cross rails, providing a clean and finished look. The cap is an original BMW part and is specifically designed to fit securely and seamlessly onto the cross rails. It is made of high-quality materials and is durable and long-lasting. This cap is an essential accessory for any BMW owner who wants to maintain the sleek and polished appearance of their vehicle.