-Product Name: Desktop Decompression Rotating Spherical Gyroscope Metal Spinning Top Office Desk Fidget Finger Toys Office Pressure Relief Gift -Material: Aluminum -Size: About 38MM -Condition: 100% brand new and high quality 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 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.