A parametric test tube rack designed to hold 9 test tubes but configurable to hold any number you can fit in a rectangle. This prints well in PLA but the result may have trouble in the autoclave where temperatures can reach 130C. I printed several in Polymakr PolyFlex (like NinjaFlex but stronger, I think). PolyFlex can handle reheating to about 200C without any trouble so it's fine for the autoclave.
Note: Be careful about the material you use to print this, especially if you deal with caustic chemicals or biological specimens in your lab.
tube-holder-9x9.stl | 2.0MB | |
tube-holder.scad | 3.5KB |