The Stainless Steel Peterbilt 359, 379 And 389 Battery Box Slip Cover is a practical and durable solution for covering OEM Non-DPF/DEF boxes. Made of stainless steel, this slip cover provides complete protection for your battery box. With its one-piece design, it fits most Peterbilt 359, 379, and 389 models. This slip cover not only enhances the appearance of your truck but also ensures the longevity of your battery box. Invest in this high-quality slip cover to keep your battery box safe and secure.