With four applications this Washer(6.5x20x1.2) is the most specified part.
A sample from the products for the Rear Fender include: Spacer(6.1x9x7.5), Washer(6.5x20x1.2), Spacer, Washer,lock.
The Rear Fender is made up of components including this Spacer which is the most expensive.