The Genuine BMW Convertible Top Back Window (E36) - 54318207803 is a replacement back window for the convertible top of a BMW E36 model. It is an authentic BMW product and is designed specifically for the E36 model to ensure a perfect fit and function. The back window is made of high-quality materials and is built to withstand the elements, providing durability and longevity. It is an essential component for maintaining the functionality and appearance of the convertible top.