Cool down with this ultra-efficient mini-fan! This impeller was designed based on CPU cooling fans. It was the most efficient impeller design in its class.
It was designed specifically for this motor:
Dayton® No. 4M299 Fan/Blower Motor- 3.3 inch Diameter, Shaded Pole, Open
1/70 horsepower, 3000 RPM, Clockwise Rotation Facing Shaft
Volts 60Hz: 115 Full-Load Amps: 0.7
Shaft Dimensions: 1/4 x 1 1/8inches
(additional motor information can be obtained from the following URL: http://www.grainger.com/Grainger/items/4M299)