This is a brand new KSD301 auto reset thermostat, Normal Close type, it acts to open when temperature reaches 85°C or (185°F).

It works on many home water heaters. Such as GE water dispenser heater and others. 

It replaces original KSD201 OR KSD301.

The connection wings can be bent to 0 to 90 degree as needed.

It has adjustable two steps wing deep by reverse the wing, so that can be fixed on different space on machine.