The shim is an important part of the Mini V Wheel Kit. By placing it between the two bearings, you can avoid binding and keep your wheels working properly. Plus, they're affordable enough to use as a washer on any of your projects! 8mm OD x 5mm Bore x 1mm thickness.

This washer is perfect for bridging the slot on V-Slot or compatible extrusion. You can use it to mount various components.