The Peterbilt 379, 386, 388, and 389 5 Inch Cab Mounted Mirror Window Chop Top is a high-quality stainless steel product that comes with all the necessary hardware for installation. Sold as a pair, it offers a 1-year warranty for added peace of mind. This mirror window chop top is easy to install using 3M tape and fits most Peterbilt 379, 386, 388, and 389 cab mounted mirror models. It also fits various other Peterbilt 300 series models. With its practicality and durability, this product is a reliable choice for enhancing your truck's functionality and style.