L155-55 Single Pole/Single Throw 
Model #: 3500-3151
Tyree #: 232357

Limit switches from the original equipment manufacturer.  

A limit switch is a normally closed switch, designed to open when a set temperature is reached.  These switches are commonly used in gas and electric furnaces to control power to gas valves and elements.  Temperature listed is Fahrenheit.

Limit switches are electrical devices that are not returnable.  Defective merchandise is replaced with an identical item.