This is a set of two tandem axle black plastic trailer fenders that are most commonly used with 13-15 inch tire and wheel assemblies. Made of high-density injection-molded polypropylene for strength and stability, this fender measures 61 inches long by 9.5 inches wide, with a height of 15 inches. The fender is impact-resistant and totally resistant to corrosion, making it perfect for freshwater and saltwater boat trailers. The fender easily bolts right onto your trailer through the pre-drilled mounting holes on the back flange, and is used on many boat trailers manufactured by top Boat Trailer Builders like Shoreland'r, Continental, Triton, Yacht Club Trailers, and others!