Luminous Responsive Yoyo, yoyo balls glow K1-Plus come with regular flating made by ABS, Style String Trick (1A, 3A, 5A), Durable and has high performanceKeep The Noctilucent yoyo under the light or in the sunlight for a few minutes to charge the glow effectHeavier than , and have more without weighting rings. A perfect toy for kids, , families, etc; Recommended for Kids Daily Practicing or Competition.If There is A String Stuck: 1.Remove 2.Take a look at whether the ball is loose and the two hemispheres must be tightened 3. Attach properly.(The most important thing)Applicable moves: (1A, 3A, 5A)Weight: 65gDiameter: 51.03mmBall width: 41.01mmShaft width: 4.38mm: 8-ball U- shaftScrew: *16mmColour:blueMaterial:ABSPackage Contents:1 * ball1 * gloves1 * velvet bag5 * rope (random color, specified color not accepted)Only the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please dont hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it