The Peterbilt 388 Knobs are a practical and durable solution for truck owners. Made of aluminum and treated with industrial hard chrome, these knobs are built to last. Engraved with the number 388, they add a touch of style to any truck. Available in both octagon and square shapes, these replacement knobs are sold individually. Whether you need to replace a worn-out knob or simply want to upgrade your truck's interior, the Peterbilt 388 Knobs are the perfect choice.