1.the material is PVC regular.
2.the size is 65cm as diameter.
3.the other size:45cm,55cm,75cm,85cm and much bigger.
4.Increase flexibility, improve coordination and develop strength.Tested by 300kg weight (regular material) and certificated by SGS.In different sizes, colors and designs. Used to strengthen and tone muscles and bones of the hips, back, legs, hands, arms, and shoulders . Helps develop overall body muscle, balance and coordination .A great exercise alternative for any age and fitness level. Washable and easy to care for .
5.it′s very famous for promotional.