Listing is for a Trane American Standard 21D340988P02 1/2hp 115 volt 1075 rpm 4 speed motor. Motor is also under an Emerson K55HXHKL-8719 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 services.