The file 'Tensegrity Cube 3D Printer Model' is (stl) file type, size is 11.5KB.
The 2 parts are not the same:in one there are larger holes to insert the knots into, needed for flat buttom.
This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/3WOb7py0d7d