Listing is for a Lennox Armstrong Ducane 43209-001 115 volt 3/4 hp 1100 rpm blower motor.  Motor is also under a A.O. Smith U48A23Z01 part number.  Motor has been removed from a working furnace that was replaced and tested by a certified HVAC technician.  If you have any questions, feel free to ask.  Item will ship promptly using USPS, UPS, and FedEx servcies.