A precision machined globe that creates a full body optical illusion when spun. When revolving, it creates an almost magical effect that looks like continuously flowing helix would merge into a surface of tabletop. Made out of high quality aluminum. Designed to spin on any desk or flat surface. The solid spherical body and smooth finish make it very pleasant to interact with. It spins silently. The base is removable to easy access the bearing. The diameter is 1.5"