Honeywell Ceramic Automatic Reset Thermostats, 2455RC Series, 2455RC-01000545, Switch Type SPST, Automatic Reset, Open on Rise, Contact Type Silver Alloy, Ceramic, 15 A/10 A, B203S, T146, Operating Temperature 0 °C to 260 °C [32 °F to 500 °F], Open Temperature 170 °C [338 °F], Close Temperature 148 °C [298.4 °F], Open Tolerance 8 °C [14.4 °F], Close Tolerance 11 °C [19.8 °F]