MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
For this hole cover it uses 3 10mm neodymium magnets.
You can use whatever thickness you want or have, as its the diameter that really matters. I used 2mm but if you have 3mm they will work fine.