Number of Blades: 4 or 5
Overall Dimension: 5-1/2"
Motor Shaft Size: 25/32" or 20MM
Set Screw Size (for motor shaft): 1/4-20
Screw Size to Secure Blade Arm to Flywheel: 10-24
Distance Between Blade Arm Screw Holes (center to center): 2-1/8"
For Quoizel, Americana, Kenroy, North American, Park Avenue, and others.