The Hatco 02-16-021-00 Thermostat features a 1/4-inch by 3-inch sensing element, a 24-inch capillary tube, and a temperature rating of 351°F. It works by sensing temperature changes and regulating the heating circuit to help control heat output and maintain the required temperature range. This supports stable equipment operation and helps reduce temperature fluctuations during regular... https://partsfe.ca/02-16-021-00-hatco-thermostat-351-14-x-3-24