Honeywell Phenolic Automatic Reset Thermostats, 2455R Series, 2452R--99400040, Switch Type SPST, Automatic Reset, Open on Rise, Contact Type Silver Alloy, Phenolic, 15 A/10 A, No Bracket, T899, Operating Temperature 0 °C to 150 °C [32 °F to 302 °F], Open Temperature 38 °C [100.4 °F], Close Temperature 52 °C [125.6 °F], Open Tolerance 3 °C [5.4 °F], Close Tolerance 6 °C [10.8 °F]