1. Outer skin material: foam rubber
2. Liner material: rubber liner
3. Diameter: No. 3: 18 cm; No. 4: 20.6 cm; No. 5: 22 cm; No. 7: 24.2 cm
4. Applicable age: No. 7 is suitable for adults, No. 5 is suitable for children 6-10 years old, No. 4 is suitable for children 3-6 years old, and No. 3 is suitable for children 1-3 years old.
5. Made of rubber material, abrasion resistance and good elasticity
6. Soft material, comfortable feel
7. Bright colors, stylish and beautiful, not easy to fade
8. Remarks: Delivery is not inflated