Upgrade your Peterbilt 379, 386, 389, or 579 with the Peterbilt National Seating 2000 Ultra Ride 10 Inch Seat Base Adapters in Crystal White. These seat adapters are available in chrome or billet aluminum and are sold individually. They are designed to fit most Peterbilt models with 2000 series National Ultra Ride seats, providing a practical and stylish solution for your seating needs. With a 10-inch size, these adapters offer a seamless and secure fit, making them a must-have for any Peterbilt owner looking to enhance their driving experience.