Thermostat, Defrost, Switch Close Temperature 35 Degrees F, Switch Open Temperature 60 Degrees F, Compatible System Type Freezer, Commercial Refrigeration, Compatible with Brand and Series True GDM, True T-12F, True T-17F, True T-19F, True T-23F, True T-24, True T-35F, True T-49D, True T-49F, True T-50, True T-72F, True TA1, True TA2, True TA3, True TC, True TD, True TG1F, True TG2F, True TG3F, True TM, True TR, True TS, True TUC, True TWT