This Plastic Boat Trailer Fender is used to cover your Trailers 8 inch to 12 inch Tires and Wheels, and installs without the need for mounting brackets. This type of Fender is known as a Frame Mount fender, which means it installs directly to your trailer frame using the bolt holes in the fender. The fender does not come with mounting hardware. This Black 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. This Fender also features a Tapered design, at its widest point it measures 26 1/4", but it narrows as the fender comes out from the trailer frame, down to about 21 1/2". The height is 8 inches, and the depth (how far away from the frame it sticks out) is also about 8 inches. Plastic Fenders are great for smaller boat trailers, Jet Ski Trailers, or other PWC Trailers since they look great and dont add a lot of cost to the trailer.