Falcon Hobby 2 bladed Carbon Fiber Lite weight spinner 89mm or 3.5 inches

Lightweight carbon fiber spinner with pre-cut propeller slot and CNC cooling holes. 89MM is equal to 3.5 inches
Distance from backplate to tip is 80mm or 3.15 inches
Weight with backplate is 27grams or .965 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.