The file 'Test Tube Rack 3D Printer Model' is (stl) file type, size is 29.4KB.
I couldn't find a decent test tube rack for a fun science set for my nieces so I designed a relatively simple one that can easily hold 10 (17mm x 100mm) test tubes. The pieces fit together tightly when printed as PLA.
bottom.stl | 2.2KB | |
sides.stl | 7.1KB | |
Test-Tube-Rack.stl | 98.3KB | |
topmiddle.stl | 44.5KB |