The following are required to build this product:
Precision made to ensure accurate fit and no rattles To go either side of hubs on a 10mm skate truck axle The bearing support spacer gets crushed over time from constant tightening, this little spacer helps bridge the tiny gaps that appear. Steel is stronger than the aluminim spacers, so over time the spacer will need replacing as the shim washer will push into the spacer.
Inner diameter = 10mm
Outer diameter = 12.1
Shim Length = 1mm