Polyform G-6 Twin Eye Fender 11" x 30" - Sand w/Adapter [G-6 SAND W/AIR ADAPTER]G 6 Twin Eye Fender 11" x 30" Sand with Adapter Polyforms G Series boat fender has raised the bar for quality and appearance in utility fenders. Subscribing to the philosophy that quality does not have to cost more, we include ribs for extra strength, inflation valves for larger sizes, and reinforced ropeholds for long term durability. Utility boat fenders with Polyform dependability. Features: Even wall thickness for maximum strength and durability