The Peterbilt 389 with 48/58 or 63/72 inch sleeper shock box cover is a practical and durable accessory for your truck. Made of polished 304 stainless steel, it not only adds a sleek look to your vehicle but also provides protection. With four 4-inch light holes, it offers enhanced visibility on the road. The 45-degree top design adds a touch of style. This shock box cover is designed to fit Peterbilt 389 models with 48/58 or 63/72 inch sleepers. Upgrade your truck with this high-quality accessory that combines functionality and aesthetics.