Print the I4 piece 2 times and the I3 piece 4 times.
Each piece consists of 2 parts, which have to be glued together with superglue.
I printed the puzzle with the following settings:
Material: PLA
Resolution: 0.2mm
Infill: 20%
no supports
no raft, no brim
Further polyform puzzles and background
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The author marked this model as their own original creation.