Suitable Age: Over 3Packaging Type: Color Box Packaged Feature1. This product is suitable for people over the age of 3， children under guardianship use2. Aerospace aluminum alloy， high hardness， impact resistance and durability3. CNC high-precision lathes， anodizing surface treatment， laser engraving and other specialized processing techniques4. Widen and high speed KK bearing， fulfill players requirements of space and styles5. Tough and flexible Nylon line， very durable. And it is the competition dedicated line6. Ball edge designed thumb groove to increase weight which makes it more faster， more stabler7. Environmental protection rubber gasket， super wear-resistant， long use life span8. Alloy axis， two-way threaded connection with the sphere center， ensure it easy to assemble and disassemble Notice1. When in a narrow space， or indoor playing， if someone nearby， please be careful.2. Don't do brutal game or throw and waving to people please!3. Do not close the face or hair When YoYo is spining， in order to avoid unnecessary accidents.4. If found the rope is fluff or harden， please change. Package Content1 x Yoyo Ball 1 x String