The International 1664766C93 9200 Turn Knob 1-3/4" is a genuine OEM part designed for use on sleeper blower switches in International Trucks/Navistar/Indak vehicles. This black turn knob features interchange part numbers 3.159.722 and 3159722, and is a direct manufacturer part number NPN. It is specifically designed for front placement on the vehicle's dashboard, sleeper control panel, and switch panel, providing a perfect fit and original functionality for your truck. This turn knob is a reliable and essential component for controlling the sleeper blower switch in your vehicle.