The Stainless Deluxe Air Volve Knob Plaque with Script and Diamond Cutout is a practical and versatile product that fits most makes and models. It is available with either "Tractor" or "Trailer" script on the plaque, adding a personalized touch. The diamond cutout included enhances its aesthetic appeal. This product is sold individually, making it convenient for customers to purchase as needed. With its durable stainless steel construction, this knob plaque offers long-lasting performance and adds a stylish element to any vehicle.