Design: this gyroscope toy is mechanical structure and no lubrication as bearings; When the gyroscope is rotating, its base maybe has a little shake; Please kindly note that be patient with the toy, which needs to be wrapped with many rounds of rope, it rotate stably when it reaches a certain speed; If you just wrap a little round of rope, it would rotate slowly and unstablyNice Toy to Pass the time: the gyroscope is designed with a simple but noble color, and it has the force to defy , which be by adults; Not only is it funny, but it can also accompany you through the boring momentsQuality and Wearable: the finger gyroscope is made of High-quality materials, strong and reliable, to rust or corrode, not easy to deform or break, and smooth makes you play comfortably, which can be applied for a long timeWonderful Present: this metal toy is delicate and interesting, suitable as a birthday gift or for your friends, family, colleagues or others who love physics and science, to help them to learn the world and explore scienceNote: A small bottle of lubricant is included. When using the product for the first time, you need to put the lubricant in the package into both ends of the gyroscope to lubricate it.size: Product size approximately 70 x 92MM, base approximately 38 x 32mmMaterial: zinc alloycolour: B-SilverPackage Contents: 1 x gyroscope1 x DrawstringOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.