The file '12 Pieces Puzzle 3D Printer Model' is (stl) file type, size is 3.54 KB.
This is a remix of the 12 pieces Puzzle by Archetrico (thing:3936723) but without rounded corners in the cutouts.
You need to print it 12 times.
Print speed 30mm/s. (It will fail/not fit with 80mm/s on my Ender3)