Rear shock absorber spacers: Aluminum

This spacer is needed when fitting an Italian spec rear shock to a later Spanish Serveta frame or engine. Serveta, at some point, started using wider rear shocks and mounts. This solves that issue and fills the gap cleanly. 

Larger outside diameter so it is the same size as the wavy spring washers used. 

I would install it on the outside of the shock so the shock is placed closer to the rear wheel.