1. Size:3 x 2.5cm.
2. Material:Stainless Steel.
3. The groove is designed to produce a fascinating visual illusion when it is rotating.
4. Easy to carry, simple and fun, also effective for focus and deep thought.
5. Perfect size suitable for adults and kids.
6. Great toy for fidgeters, anxiety, focusing, ADHD, autism, quitting bad habits, staying awake.
