The Chrome Air Valve Knob with Old Red Kenworth Logo is a practical and stylish addition to any vehicle. Made of durable aluminum and treated with industrial hard chrome, this knob is built to last. It is available in both octagon and square shapes, and fits most makes and models. With its sleek design and high-quality construction, this air valve knob adds a touch of sophistication to your vehicle while providing reliable functionality. Upgrade your vehicle's interior with this timeless accessory.