This product is a genuine BMW cover designed for the upper left B-column of the vehicle. It is colored in Anthrazit, a dark gray shade, and the part number is 51438056973. This cover is specifically made for BMW vehicles and is an authentic replacement part. It is used to cover and protect the B-column, which is the vertical support between the front and rear doors of the vehicle. This cover is made with high-quality materials to ensure durability and a perfect fit for your BMW.