This gray single-axle plastic trailer fender is made of tough and reliable ABS plastic, which is designed to stand up to the heat and outdoor elements without cracking or warping. Plastic fenders are great for smaller boat trailers, jet ski trailers, or other private watercraft trailers since they look great and don't add much to the cost of the trailer! This fender is seen most commonly on trailers with 8 to 12 inch tires and wheels.