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Test Tube Stand 3D Printable Models
Test tube stand/holder 10 mm 32 pcs
Thingiverse
Yojik27
A revolving test tube holder
Thingiverse
Dragon_GM
API Freshwater Master Test Kit+ Caddy
Thingiverse
DadsAlwaysDoingSomething
Test Tube Holder for 1in/25mm tubes
MakerWorld
tc_217
