These “Solid Test Tube Holders” are compatible with standard test tubes and with the “Spiralized Test Tubes” model linked below. These “Test Tubes” can be used as flower holders, seedling holders or as a toy chemistry set!

See here for video: https://youtu.be/CXAep9BBbqg

Models are provided for the following test tube sizes: 6ml (75x12mm), 10ml (100x13mm), 19ml (125x16mm), 36ml (150x20mm), and 55ml (150x25mm).

There are “3 Tube” and “5 Tube” version for each size. The files come with built in supports for the top holes. Print as oriented, avoid using brim.

The racks are compatible with these 3D printable Spiralized Test Tubes: https://than.gs/m/988494

More rack designs are available here: Modular Wire Test Tube Rack: https://than.gs/m/988496 Solid Test Tube Holders: https://than.gs/m/995359