The first edition of the Pipe attribute from CryptoPunks. This is currently the only one in existence. The edition size is capped at 3. It's made of individual 1.875" machined aluminum cubes, finished with a powder coat, and assembled with a hidden network of threaded rods and bolts.
Mark Graeffe
Pipe (1st Edition), Sculpture #20
Powder coat on aluminum
29.625 inches x 18.75 inches x 6"