1. Material: PU 2. Short circumference: No. 3: 39-41 cm, No. 6: 47-48.3 cm, No. 9: 52.7-54 cm 3. Long circumference: No. 3: 52-54 cm, No. 6: 64.1-65.4 cm, No. 9: 70.5-72.4 cm 4. Weight: No. 3: 200-240g, No. 6: 320-340g, No. 9: 385-425g 5. Anti-leakage nozzle design, exquisite workmanship, not easy to leak 6. PU fabric, thicker and more wear-resistant 7. Nylon wrapped yarn, full of compression resistance 8. Butyl liner, good air tightness, not easy to leak 9. Reflective PU material is used, and the ball can show a glowing state under the illumination of light 10. Note: Delivery is not inflated, please purchase inflatable tools by yourself