Dice D3
thingiverse
Very simple D3 based on a D6 with 2 of each number. Model is designed in halves so the faces print nicely, simply print and glue together. The alignment holes are sized for filament to be used for alignment, but it's unlikely you'll need them on something so simple to glue together; note that if you resize the model, the alignment holes will be a different size too.
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