The one shown above is made with CMYK
pencils. This idea is due to Jeff Rutzky, an NYC designer who
often works with printers in the CMYK color space. He
commissioned
this special instance of the sculpture with those four colors. Although
I had originally planned an edition of 25, and this was going
to be #19/25, I liked Jeff's concept so much that I decided to end the
edition early. So it is numbered 25/25. There is and will
be no
#19-24.

The view shows how it looks along a three-fold axis of symmetry.

For some viewers, part of the interest
lies in the form of the
interior.
The four hexagonal tubes are hollow, so the sculpture as a whole is
hollow.
But, what shape is its cavity? What would someone on the inside
see?
To the mathematician, the answer is "the rhombic dodecahedron," a
geometric
solid bounded by twelve rhombuses.