Limit Thermostat- 1/2" disc diameter - Automatic Rollout, Cut out 155F.  Automatic reset. For use on furnaces, dryers, fans, dishwashers, limits, ect., U.L.Rated, #LS155. These limit thermostats are brand new and made by Napco US Corp. Picture shows 250F 1/2" limit, but listing is for 155 F 1/2" limit.