Honeywell Phenolic Automatic Reset Thermostats, 2455R Series, 2455R--00820196, 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 40 °C [104 °F], Close Temperature 25 °C [77 °F], Open Tolerance 3 °C [5.4 °F], Close Tolerance 5 °C [9 °F]