The Stainless Steel Trailer Air Suspension Inf/Def Switch Plate is a practical and durable product designed to fit most Peterbilt makes and models. Made from high-quality stainless steel, this switch plate is built to last. It provides a convenient and efficient way to control the air suspension system in your trailer. With its sleek design and reliable functionality, this switch plate is a must-have for any truck owner. Upgrade your trailer with this reliable and easy-to-use switch plate for improved control and performance.