Honeywell Ceramic Automatic Reset Thermostats, 3450RC Series, 3450RC 87130005, Switch Type SPST, Automatic Reset, Open on Rise, Contact Type Silver Alloy, Ceramic, 15 A/10 A resistive max., B239, T146, Operating Temperature 0 °C to 260 °C [32 °F to 500 °F], Open Temperature 85 °C [185 °F], Close Temperature 76.67 °C [170 °F], Open Tolerance 2.78 °C [5 °F], Close Tolerance 3.89 °C [7 °F]