Feature1The yoyo can cultivate the imagination creativity rapid reactionability motor skills and eye-hand coordination2Adopt CNC lathe to precision processing the increased density delivers greater momentum and increased challenge38 ball KK bearing the magic yoyo will keep balance when in rotation and it runs in a fast speed4Anodize surface the laser engraving technology is used in design the trademark and the surface color uses anodize technique which makes it has fresh color and good stereoscopic effectsIt won't lose color when knocked againstSpecifications:Material: AluminumColor: Black + Gold Red + Silver(optional)Age: 8 +Diameter: 54 mmWidth: 42 mmGap Width: 462 mmBearing: Concave bearingBearing Size: 635 mm * 127 mm * 476 mm(C)Axle: M4 * 10 mmString Trick: 1A 3A 5AString Length: 110 cm / 4331 inPackage List:1 * N11 Yoyo1 * String