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.

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Where the tabs go through the frame the spacing is slightly different in the front and back. The front holder is 3.6mm thick and the rear is 4mm. You can use the front in the rear but not the rear in the front. You can see it in the pic if you look closely.