Honeywell Polyphenylene Automatic Reset Thermostats, 2455RP Series, 2455RP-91000433, Switch Type SPST, Automatic Reset, Open on Rise, Contact Type Silver Alloy, Polyphenylene, 15 A/10 A, B203S, T146, Operating Temperature 0 °C to 150 °C [32 °F to 302 °F], Open Temperature 50 °C [122 °F], Close Temperature 35 °C [95 °F], Open Tolerance 3 °C [5.4 °F], Close Tolerance 5 °C [9 °F]