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One of my classics, well rendered by direct metal printing; this piece is essential equipment for anyone living in 3-dimensional space.  Its twisted double-tetrahedron is the simplest and most deeply symmetrical of its family.  The next member of that family is the octahedral Metatrino.

Ora metal print, 4" diameter - $490

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In 2007 this design was enlarged from 3" to 4" diameter.  If you need a 3" instance, e.g. to complete a collection, contact us.