The Markel Products Co. 63818003 Thermostat Knob is a manual control component designed to provide convenient temperature adjustment on compatible thermostat assemblies. It attaches to the thermostat control shaft, allowing users to rotate the knob to change the temperature setting and regulate heating operation. This OEM component is used with Markel/TPI electric heating equipment, i... https://www.partshnc.com/63818003-markel-products-co-thermostat-knob