The Stainless Air Valve Knob Plaque with Cursive Script is a durable and stylish addition to any tractor or trailer. Made of stainless steel, this knob plaque is available with either tractor or trailer script and fits most makes and models. Sold individually, this practical accessory adds a touch of elegance to your vehicle while also serving a functional purpose. Upgrade your air valve knobs with this sleek and versatile plaque, adding a touch of sophistication to your vehicle's interior.