The Peterbilt 389 Sleeper Extension Panels are a practical and beneficial addition to your truck. Designed for 70-inch sleepers, these stainless steel panels are available in widths ranging from 3 to 10 inches. With a 1-part extension, they fit most Peterbilt 389 makes and models. These panels not only enhance the appearance of your truck but also provide extra space and functionality. Easy to install and sold individually, these extension panels are a reliable and durable solution for truck owners looking to optimize their sleeper space.