Design: This gyroscope toy features a mechanical structure with no lubrication in the bearings. When the gyroscope is rotating, the base may experience slight movement. Please be patient when using the toy, as it needs to be wound with several rounds of string to achieve stable rotation at sufficient speed. If only a few wraps are used, the rotation will be slow and unstable. Nice Toy to Pass the Time: The gyroscope is designed with a simple and elegant color scheme and demonstrates the force that defies gravity, making it appealing to adults. It is not only entertaining but also a great companion during idle moments. Quality and Durable: The finger gyroscope is made of high-quality materials, strong and reliable, resistant to rust and corrosion, not easily deformed or broken, and features a smooth surface for comfortable handling, suitable for long-term use. Wonderful Present: This metal spinning toy is delicate and engaging, making it an ideal gift for birthdays or special occasions for friends, family, colleagues, or anyone interested in physics and science, helping them learn about the world and explore scientific principles. Note: A small bottle of lubricant is included. When using the product for the first time, apply the included lubricant to both ends of the gyroscope to ensure proper function. Size: Product size approximately 70 x 92mm, base approximately 38 x 32mm Material: Zinc alloy Color: C-Black Package Contents: 1 x Gyroscope 1 x Drawstring Only the above package content is included; other items are not part of the package. Note: Due to light reflection and differences in display screens, the color of the item in the picture may vary slightly from the actual product. Measurement error is +/- 1-3cm.