The Duke 349950 Thermostat W/ 3/16" X 11-7/8" Nickel Bulb S-Type regulates operating temperature in compatible commercial foodservice equipment. Featuring an S-type sensing bulb measuring 3/16 inch in diameter and 11-7/8 inches in length, it responds to temperature changes and activates or deactivates the heating circuit as needed. This replacement thermostat supports controlled heati... https://partsfe.com/thermostats-316-x-11-78-48-for-duke-part-349950/1-349950.html