This weathershield has been designed to fit Ford AU BF models on the driver's side window. It has been made out of heavy duty acrylic so it will be able to deflect loose stones that may be flung up at the side window from passing vehicles. The weathershield will allow you to have your window partially open when it is raining without letting water into the interior of your car. Installing a weathershield on your window gives you the ability to get optimum ventilation without allowing the elements into your vehicle. This is definitely an item recommended to people who spend long hours on the road.