Carrier of standard microscope samples (76x26x1mm).
This model is part of the OpenLab proyect, more info and source files at OpenLab Github Repo
Author: Ángel Larrañaga Muro (AngelLM)
To assembly both parts together insert a piece of 1.75mm diameter filament through the hinges.
This model is parametric, so you can modify it to hold the number of samples you want. Just this easy as shown at the video above!
All you need is FreeCAD, a free, open source and multiplatform 3D modeler.