Thingiverse
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Thangs
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CGTrader
Youmagine
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Laboratories 3D Printable Models
Modular Magnetic Rack for 2 / 1.5 / 0.5 ml Tubes
MakerWorld
Matthias
Millennium Falcon Tube (4x50ml) Holder
MakerWorld
CHERRYSLICE
All-in-one test tube clamp, no supports required
MakerWorld
Amr3d
Optical LAB Table
MakerWorld
BobSonicLab
Aperture Laboratories
Printables
ethernet389
Lab Centrifuge Fidget Spinner
Thingiverse
Mat-Lek