The Peterbilt AC and Heater Slide Knobs with Jewel Insert are a practical and stylish addition to your Peterbilt truck. Available in chrome plastic, these knobs come in plain or with a jewel insert in various colors including amber, blue, clear, green, purple, and red. Sold as a set of three, these knobs are designed to fit most Peterbilt models. Enhance the functionality and aesthetic appeal of your truck's AC and heater controls with these high-quality knobs.