This product is a genuine BMW cover for the bottom left D-column, which is located on the side of the vehicle between the rear passenger door and the trunk. It is made of black material and has a part number of 51437245323. This cover is designed specifically for BMW vehicles and is intended to replace a damaged or worn out cover on the D-column. It is a high-quality and durable product that is an exact fit for the specific model and year of the vehicle.