Twelve different pieces, many combinations of ten pieces can be assembled into an icosahedron of diameter 6cm, about the size of a tennis ball. Extra-thick 1.5mm walls. These puzzle pieces were originally designed by Wayne Daniel, here the pieces form an edge-beveled icosahedron.
The pieces are now labeled A-L as described in this document
f = 0.447,
offset = 0.025 mm,
wall thickness = 1.5 mm,
hole radius = 0.05 mm