Product review (5 stars): fan blade moves air
I bought this fan blade and a new motor to fix an old exhaust fan. Wow much faster motor speed and airflow combination than the old one Due to the higher motor speed the fan is louder than before, but with 9 blades instead of the old 5 blade the sound has no whine just the sound of a powerful air flow. I accidentally ordered two fan blades instead of one. Cost of the return helped me decide to just keep the extra until I replace the kitchen fan motor. I know it's easy to give 5 stars but for me if I like it  its a 5. If I don't it's not!