The Fence Saver secures to the fence or railing and is designed to prevent contact to the delicate aluminum fencing. The pontoon corner bumpers come in two shapes for both radius style or 90o pontoon corners. The corner bumpers mount over the original factory installed aluminum corner section to provide air-cushioning impact protection when docking. Each corner section is molded from a special gray pvc formulated to match the aluminum color of the boat and secures with stainless fasteners. All pontoon fenders are made from our own marine-grade, U.V. resistant vinyl and have an integrated rubber football style valve for easy inflation.