Tie Down Engineering Large Black Plastic Fender #44331 An attractive upgrade to any trailer, these high impact polyethylene fenders are UV protected. Designed for normal and low profile tires. Each fender requires 2 mounting brackets. Small 21in.L x 7 3/4in.W x 5in.H. Large 45in.L x 11 3/8in.W x 11in.H.