+++ Inside/outside on the print. Print top surface is the side thats near the belt (you can feel the angle)+++
Spacers for the bearings that centers the belts og x and y axis. Makes the Printer more silenced and add the belt tensioner from https://www.thingiverse.com/thing:3601830 then it is easy to adjust the belt and it is always in center.
you need 6pcs. Print time 3-4minutes depends on how many.
Bearing diameter is 16mm.
Release the bolts on both sides of the Y axis in the rear and front and adjust :)