The Peterbilt 389 48 Inch and 63 Inch Blank Sleeper Extension Panel is a practical and durable addition to your truck. Made of stainless steel and 3 inches wide, this extension panel is sold as a pair and is designed to continue the sleeper panel. It fits most Peterbilt 389 with 48 inch or 63 inch sleepers. This product is perfect for those who need extra space in their sleeper and want a high-quality, long-lasting solution. With its sturdy construction and easy installation, the Peterbilt 389 48 Inch and 63 Inch Blank Sleeper Extension Panel is a must-have for any truck driver.