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A truncated and extended 3x3x3 in the shape of a trigonal trapezohedron.
This modification can be made by truncating a 3x3x3 on six corners. See the third image. Afterwards the remains of the cube's faces are "deleted" by applying extensions on them. The result is a rhombohedron also know as trigonal trapezohedron.
Since 2011 a mass produced version is available.
Edge length: 68 mm
Weight: 120 grams
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