The other half of a sculpture. The two parts are connected by ten 3/16" spheres which you'll need to source. Ball bearings will work fine; I'd recommend gluing them to just one half so you can see the design both together, and with its interesting cross-section exposed.
If you'd like to see this in metal, I'd recommend here.
Here's a button to get both halves: +
Lastly, here's the unsplit version.