Limit Switch - Normally Closed - Open on Rise -  135 F. - 3/4" Diameter. Two Terminal. 25A @ 240V, 12.5 @ 277V, 12.5A @ 480V. For use on furnaces, appliances, ect, U.L.Rated, #L135. Automatic reset. These limit switches are brand new and made by Napco/Supco Corp.