Honeywell Ceramic Automatic Reset Thermostats, 2450RCH Series, 2450RCH80020677, Switch Type SPST, Automatic Reset, Open on Rise, Contact Type Silver Alloy, Ceramic, Stand Off, 15 A/10 A, B201B, T146, Operating Temperature 0 °C to 260 °C [32 °F to 500 °F], Open Temperature 246.11 °C [475 °F], Close Temperature 220 °C [428 °F], Open Tolerance 11.11 °C [20 °F], Close Tolerance 11.11 °C [20 °F]