The Peterbilt 389 Polished Stainless Steel DEF Tank Side Covers are a practical and durable solution for medium and large DEF tanks. Made with 16 gauge #8 304 non-directional polished stainless steel, these covers are built to last. They come as a pair and can be easily mounted to existing OEM brackets using the included OEM hardware. Designed to fit most Peterbilt 389 models from 2022 and newer with medium or large DEF tanks, these side covers provide a sleek and polished look while protecting your DEF tank.