The Dorman Universal Heavy Duty HVAC Heater Control Knob is designed for simple and convenient control. This knob is designed to match the fit and function of the original control knob on specified vehicles. It is made from durable plastic and is easy to install. This knob is perfect for replacing a worn or broken control knob and restoring the convenience of controlling the temperature in your vehicle. With its universal design, this knob is compatible with a variety of vehicles. FleetPride is your First Click in Heavy Duty®.