The Waring/Qualheim 027198 Rheostat Potentiometer provides adjustable electrical resistance within compatible commercial food equipment. Turning the control stem changes the resistance value, allowing the connected circuit to regulate an electrical parameter such as motor speed or heat level according to the equipment design. The 0.175-inch diameter stem provides the interface for an ... https://partsfe.com/rheostat-for-waring-part-027198