Honeywell Phenolic Automatic Reset Thermostats, 2455R Series, 2455R--90820597, Switch Type SPST, Automatic Reset, Open on Rise, Contact Type Silver Alloy, Phenolic, 15 A/10 A, B201A, T147, Operating Temperature 0 °C to 150 °C [32 °F to 302 °F], Open Temperature 120 °C [248 °F], Close Temperature 75 °C [167 °F], Open Tolerance 4 °C [7.2 °F], Close Tolerance 7 °C [12.6 °F]