Falcon Hobby 82mm 2 bladed Carbon Fiber Spinner with CNC Cooling 3.25 inch

Lightweight carbon fiber spinner with pre-cut propeller slot and CNC cooling holes. 82MM is equal to 3.25 inches
Distance from backplate to tip is 72.3mm or 2.85 inches
Weight with backplate is 23.2 grams or .815 of an ounce
The center of the backplate with the provided insert is made for an 8mm shaft,

Popular on most motors. Without the insert, it is 10MM.