Fan Limit Switch (fan control thermostat), Normally Open - Close On Rise, (160F)-(20) - Open (140F).  16 FLA, 60 LRA @ 240V, 30,000 cycles. For use on furnaces. ect, U.L.Rated, #NFN160. Automatic reset. These fan limit switches are brand new and made by Napco Corp. Made in the USA