Expandable Test Tube Rack for small objects storage

Expandable Test Tube Rack for small objects storage

thingiverse

This is a holder for small test tubes of 12 x 100 mm. I bought [these](https://nl.aliexpress.com/item/32952866702.html). The holders can be coupled on the short sides (to make an impressive display on your desk) or/and on the long sides (to make a compact collection).

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