Upgrade your Peterbilt 379, 386, 389, or 579 model with the Peterbilt National Seating 2000 Ultra Ride 10 Inch Seat Base Adapters in yellow. 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 durable solution for your seating needs. With a 10-inch size, these adapters offer a secure and comfortable fit, making them an essential addition to your truck's interior.