The puzzle consists of 9 puzzle pieces and a box.
There are 4 solutions.
A solution video is here:
I printed the puzzle with the following settings:
Material: PLA
Resolution: 0.2mm
Infill: 20%
no supports
no raft, no brim
When you divide a hexagon into 3 equal parts, you get pentagons.

If you extrude these pentagons and combine 3 of these shapes each, you get trigemprisms. There are 25 trigemprisms.
A zip file is attached, which includes the following:
STL files for all 25 Trigemprisms
Photos and graphics
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The author marked this model as their own original creation.