Simple Test Tube Rack

A fairly basic test tube rack with holes for 5 tubes, up to 23mm diameter tubes.

Mine is in ABS.

In hindsight, now that it's printed (hence these machines used to be called rapid prototypers!) I would make the legs a little sturdier (therefore I have included the original .blend file for those who can use Blender.

I didn't use a raft - see instructions!!!