Interchangeable test tube rack for high school biology.
4 X 50 mL tubes
12 X 15 mL tubes
12 X 1.5 mL tubes
Parts from McMaster-Carr (https://www.mcmaster.com)
1 X M5 bolt; part no. 91290A298
1 X M5 nut; part no. 93625A112
6 X M5 washer: part no. 91116A350
Print without supports. Use 2-3 washers between blocks.
| Block_A.stl | 297.0KB | |
| Block_B.stl | 298.7KB | |
| Block_C.stl | 436.2KB |
