The Vulcan Hart 00-833220-00011 is a 2-1/4-inch diameter thermostat knob used for temperature selection on compatible jacketed kettle controls. Its marked surface gives operators a clear reference when rotating the control to the desired heat setting. The knob provides a direct interface between the operator and the kettle thermostat, making temperature selection simple during normal ... https://partsfe.com/knob2-14-d-off-10-1-for-vulcan-part-00-833220-00011