Rack for 4 test tubes

Remixed so that it could stand on a counter instead of hooking on the side of the tank.

Also made the part with the holes thicker so that it would print without supports (the first time I tried printing it the thin piece at the edge fell over half way up the first hole).

Printed without supports or infill, 2 outer layers, .25 resolution, 30mm/sec.

Recommend printing in white so that you can take your color readings with the tubes in the rack.