Dodecahedron a concrete mold
thingiverse
A dodecahedron concrete mold, just two peaces and all you need it some rubber-bands to keep them together when molding. I used some silicon on the inside just to that the concrete should't stick to the mold, but I'm not sure if that's necessary if you print with PLA. This mold can be used over and over again, so that you can mold how many hexagon garden ornament as you wish.
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