Made of Alloy-- that allows for stable and balanced high speed routines Unresponsive yoyo--Style:String Trick (1A, 3A, 5A), this yoyo is not just for playing, it is also an intellectual toy, it can improve players' coordination, flexibility and strength Durable --durable recovery system and long idling time, designed to train fine motor skills and eye-hand coordination For Age 6 up--Nice way to keep the kids off the Internet and off from the sofa in front of the television Small size to take out door,polishing rim of surface Designed to train fine motor skills and eye-hand coordination It is not only for daily entertainment, but also for acrobatic performance with most entertaining fancy It can cultivate the imagination, creativity and rapid reactionability A perfect toy for kids, friends, families, etc Body Shape :Butterfly Weight:64g Diameter:47.4mm Width:41mm Width:4.7mm Bearing Size:Size C (Large) Bearing: KK bearing Body Material:Alloy6061 Response: Yellow Silicon Pad Twist-apart :Twist-Apart String Length:43.31in/110cm Strings(Note: Random color, don't accept the specified color. ) colour:black Material:alloy Package Contents: 1 * N8 YOYO Ball 5 * Strings 1 * Glove 1 * Storage bag Only the above package content, other products are not included. Note: Light 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.