Product review (2 stars): not what it's supposed to be.
I ordered mine from Innovative Supply for $17.49, free shipping.
  The direction of rotation was wrong. Blows down instead of up. The mounting bracket was all wrong. Too short and mounted on wrong side of motor, so fan was not in the enclosure. Fan blade actually rubbed the mounting bracket. Solution. Disassemble completely. Reverse armature and attach old mounting bracket on bottom with spacers in order to raise fan inside enclosure. Cut off plug and hard wire into line hi-lo switch. When all said and done and properly installed as original, slow speed did not work. On top of that, motor advertised is 1.1 Amps.
Original was 1.8 Amps. This one is .7 amps. High speed (black wire) barely opens vent to exhaust.
Very quiet running compared to my original which was loud enough to keep you from hearing yourself talk, but did the job quite efficiently.
Buy junk, get junk I guess.
The only good part was I got the part in record time of 2 days.

June 27.
I decided to contact Amazon about my problem and explained my concerns. Within a very short time I was contacted and the situation was remedied almost immediately to my satisfaction. Each solution may be different for each customer, but never the less, in my particular case, I am very satisfied the way it was handled and I give Amazon and Innovative Supply a full 5 stars.