Product Information: Name: Desktop decompression rotating spherical gyroscope Material: aluminum Color: yellow / gold / silver / brown Function: Rotation, decompression, desktop, decoration Product size: diameter: about 4cm/1.57in (Due to manual measurement, please allow a slight error) Packing: bag Packing size: about 5*5*5cm/1.97*1.97*1.97in (Due to manual measurement, please allow a slight error) Packing List: 1* gyro Features: It is a precision machined desk toy that creates a mesmerizing optical illusion when spun. Simply rotate it to reveal the mind-bending effect of a continuously flowing helix. A piece of kinetic art that invites you to transform it from precisely engineered still shape into hypnotic optical illusion. When revolving, it creates an almost magical effect that looks like continuously flowing helix would merge into a surface of tabletop. 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 around. 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 sessions. We believe optical illusion is a unique way to bring excitement to anyone. It makes a truly great and original present that creates a bit of magic every