The Peterbilt 379, 386, 388, and 389 5 Inch Cab Mounted Mirror Window Chop Top with Flange 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. With easy installation using 3M tape, this mirror window chop top fits most Peterbilt 379, 386, 388, and 389 cab mounted mirror models, as well as various other Peterbilt 300 series models. Enhance your truck's functionality and style with this practical and durable product.