KLIXON MANUAL OVERLOAD PROTECTOR MEG57RB FRANKLIN #  275416-128 phenolic motor protectors 1" Diameter Single Phase with Eared Base.Mounting holes: 1.500" center-to-center. I believe these were used in approximately 1/3 HP dual voltage 1 Phase Motors but I cannot tell for sure. Element is approx.. 3.3 Amps. Check with Klixon (Sensata Technologies) for suitability for your application.   Perfect condition. Because they are out of warranty you are buying as is. I do guarantee to be good.  Any defect return in 30 days for complete refund for this item.