Stackable Filament Rack

I know there are better ways to do this, but I just made a filament rack. Stores 3 standard 1 kg spools of filament, regardless of the interior diameter. If you have special spools like Dremel (which have tiny interior holes), this could be useful. It's also stackable, so you can pile up to 3-4 (just a general caution for balance) on top of each other!

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