Features: 1. It is a desk toy that creates a mesmerizing optical illusion when spun. Simply rotate it to reveal the mind-bending effect of a continuously flowing spiral. 2. A piece of art that invites you to transforms it from precisely engineered still shape into hypnotic optical illusion. 3. When revolving, it creates an almost magical effect that looks like continuously flowing spiral would merge into a surface of desktop. 4. It is designed to spin on any desk or flat surface. The solid body and smooth finish make it very pleasant to interact with. It spins silently so you won't be bothering anyone. 5. Perfect for creators, makers, thinkers and anyone who wants to release their inner creativity and imagination. Keep focus, relieve stress or simply relax during working hours or brainstorming meetings. 6. We believe optical illusion is a unique way to brings excitement to anyone. It makes a great and original present that creates a bit of magic each time you interact with it. Each unit is designed with attention to the smallest detail and built to last a lifetime. Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow minor deviation due to manual measurement. Specification: Type: Decompression desktop gyroscope toy Material: Alloy Process: surface oxidation treatment Age: 6 years old and above Size: 40mm/54mm Include: 1 x Decompression desktop gyroscope toy