The Stainless Steel Diagnostic On/Off Switch Plate is a durable and practical solution for your Peterbilt truck. Made of high-quality stainless steel, this diagnostic switch plate is designed to fit most Peterbilt makes and models. Sold individually, this switch plate is a reliable and long-lasting option for your truck's diagnostic needs. With its sleek and sturdy design, this switch plate is a must-have for any Peterbilt owner looking for a reliable and practical solution.