Manufacturer Name: Honeywell Product Number: T651A3018/U OEM Part Number: T651A3018/U Product Description: 120-277V Spdt Line Voltage Single Stage Heating Or Cooling Thermostat With Therm Weight:1.5lbs/680.39g The Honeywell T651A3018/U is a line voltage thermostat used for controlling heating systems.It works by sensing the room temperature and turning the heating sy... https://www.partshnc.com/t651a3018u-honeywell-120-277v-spdt-line-voltage-single-stage-heating-or-cooling-thermostat-with-therm