The Wells 2T45917 Thermostat controls temperatures in a range of food-warming equipment. It comes with a 3/16” x 12” bulb, a 42” cap, and an extra switch for more functions. Designed specifically for Wells Warmer models including BMW, HT, MOD, and SS series, it guarantees constant temperatures supplemented to food. https://partsfe.ca/2t45917-wells-thermostat-ka-316-x-12-42