Belmor rock guards reduce down time and help maintain optimal radiator performance by protecting your radiator from bugs, stones, and other small debris. Also known as an internal bug screen, Belmor rock guards are designed to original equipment specifications to fit most heavy-duty truck makes and models and offer low maintenance and longevity. They're made with heavy-duty, yet lightweight powder-coated aluminum set in a black anodized aluminum frame. All rock guards are proudly made in the USA and backed by a Limited Lifetime .