The Royal Range 1517 Griddle Thermostat Knob is designed for compatible commercial griddle equipment. Featuring HI and LOW settings with a 150-400°F temperature range, it helps operators adjust heat levels according to cooking requirements. The knob measures 1-15/16 inches in diameter and has a 11/16-inch-long mounting protrusion. Its clearly marked temperature settings support conven... https://partsfe.com/dial2-d-off-lo-150-400-hi-for-royal-range-part-1517