These semi-truck quarter fenders are built from high-density polyethylene for durable corrosion-resistant performance in demanding road conditions. Thickened rubber sheets help absorb shock and reduce road noise for a smoother ride. The set is designed to help keep your truck cleaner by reducing dirt and gravel splash from the tires. With included tube brackets and mounting hardware, installation is straightforward. It is compatible with a wide range of popular semi-truck models including Kenworth, Peterbilt, Freightliner, International, Mack, and Volvo.