This propeller hub spacer can be used with the Graupner E-PROP propeller series to accommodate different motor shaft diameters. All hub spacers have a 8mm outer diameter.
I had some props with oblong holes so I got these to make them work. They are very nice and uniform and allowed me to get the props balanced.
Reviewed by: Gar Cooley from Pennsylvania, USA on 7/2/2017