The Wingmaster Stainless Steel Peterbilt - Sleeper Rear Vertical is a practical and durable product designed specifically for Peterbilt 379 makes and models with 63-inch sleepers. Made from high-quality stainless steel, this set of four pieces is a perfect fit for most Peterbilt 379 models. The sleeper rear vertical features a blank design, providing a sleek and clean look. With its easy installation and long-lasting construction, this product is a reliable choice for enhancing the functionality and appearance of your Peterbilt truck.