Both water or jelly inside the ball is ok
Material: TPR (pass EN71 and ASTM)
With the yo-yo ring is ok
You can squeeze it to relax yourself, let the ring on your finger, throw the ball out, the yo-yo is stretchable
Inner packing: 1pc/polybag, 12pcs/display box
Outer packing: 144pcs/ctn, around 0.05cbm/ctn
Color: assorted color