The A/C Extension Knob is a practical and convenient accessory for your Peterbilt 379 truck. Made of chrome plastic, this knob is designed to enhance the functionality of your A/C system. It is sold individually and comes in a carded display packaging. With a perfect fit for the 2000 model, this A/C Extension Knob is a reliable and durable solution for controlling your truck's air conditioning. Upgrade your truck's interior with this easy-to-use and stylish accessory.