Magnet Cylinders, Tetrahedral Packing: 6x3-magnet cylinders. 4 cylinders make an extended tetrahedron, which are then packed in a face-centered cubic configuration.
By sparr0 (Clarence Risher) via Flickr
More in the Flickr Magnet Designs Set
I COULD MAKE THIS :O !!!!!!!
I COULD MAKE THIS :O !!!!!!!