Age Range:more than the 3 years old Body Shape:butterfly Bearing:10 ball Bearing Size:Size C () For age:8 years yo-yo professional For the advanced player in the competition and daily practice that allows routines has stable high speed and balance The shape of the wing of the dash facilitates rope tricks Improve coordination,flexibility and strength of the playersN11 yo-yo professional For the advanced player in the competition and daily practice that allows routines has stable high speed and balance The shape of the wing of the dash facilitates rope tricks Improve coordination,flexibility and strength of the players Sustainable recovery system and long idling time colour: Material:alloy Size:Sphere diameter 54mm Package Contents: 1* gloves 1* storage bag 1* ball 5* rope Only the above package content, other products are not included. Note: Light reflection 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.