**Product Specifications:**
1. **Brand:** LI-NING
2. **Model:** 20K Competition Grade Basketball
3. **Core Advantages:**
- Enhanced grip with deep grooves
- Slip-resistant and durable
- Sticky touch feel
- Professional rebound
- Unique appearance
- Technology-infused interior
- Leak-proof air nozzle
- Suitable for all types of courts
4. **Features:**
- Moisture-absorbing PU surface
- Enhanced grip with large granules
- Improved ball control with cross grooves
- Sweat-resistant and easy to clean
- High durability for indoor and outdoor use
5. **Material:** High-quality PU leather
6. **Size Chart:**
- Size 3: 56-57cm circumference, 300-340g weight
- Size 4: 65-67cm circumference, 370-410g weight
- Size 5: 69-71cm circumference, 470-500g weight
- Size 6: 72-74cm circumference, 510-550g weight
- Size 7: 75-78cm circumference, 560-665g weight (standard basketball)
7. **Durability Testing:**
- Exceeds national standards for impact resistance
- Tested for 20,000 impacts with no signs of damage
8. **Maintenance Tips:**
- Avoid water contact
- Do not expose to heavy pressure or direct sunlight
- Proper inflation required (7-9 psi)
- Use mild adhesive for repairs, avoid using strong glue
9. **Anti-Counterfeiting Measures:**
- Authenticity label with unique code for verification
- Online verification system on the official LI-NING website
10. **Official Website:** [www.lining.com](www.lining.com)
For more detailed information and product care instructions, please refer to the official LI-NING website.