50mm 2x2 Test Tube Rack

Clip together test tube rack designed to hold large test tubes.  Holds 4 test tubes up to 50mm diameter.

Print 1 base, 3 tops, and 4 sides.  You can get away with only 2 tops.  Holey options should use less filament.

Inspired by https://www.printables.com/model/881093-50ml-test-tube-rack-3x3