SIZE&MATERIAL With a total size of 4.8*4.8*5.1CM. It is constructed with solid material, which features weather resistance and rust-proof bringing you a durable and reliable using experience. RELEASE STRESSWhen revolving it creates a full body optical illusion. It's suitable for creators, makers, thinkers, and anyone who wants to release their inner creativity and imagination. Keep focus, relieve stress, eliminate anxiety, or simply relax during working hours. ROTATION PERFORMANCEDesigned to spin on desk floor or any flat surface. Simply rotate it by hand to creates an almost magical effect that looks like continuously flowing helix would merge into a surface of tabletop.Tops is very easy to rotate continuously for more than 4 minutes,it spins silently so you won't be bothering anyone around. ORNAMENT&PORTABLEOur wind gyro is still a nice ornament. Putting it on your office desk or bedroom desk even shelves will definitely be a beautiful landscape. It has a perfect size to carry anywhere such as travel, business and party etc. GIFT&WARRANTY Desktop revolve decompression tops is a great gift for children. It is also a good choice for friends and family. If for any reason our product doesn't meet your standards, please contact us via email, we will offer you a statisfactory service.