Honeywell Phenolic Automatic Reset Thermostats, 2455R Series, 2455R--00030829, Switch Type SPST, Automatic Reset, Open on Rise, Contact Type Silver Alloy, Phenolic, 15 A/10 A, No Bracket, T147, Operating Temperature 0 °C to 150 °C [32 °F to 302 °F], Open Temperature 87 °C [188.6 °F], Close Temperature 77 °C [170.6 °F], Open Tolerance 3 °C [5.4 °F], Close Tolerance 4 °C [7.2 °F]