The 3D CALIBAR-600C badminton racket is built on the 3D Calibar Technology Platform and features a high-tech, geometric badminton racket frame design that greatly reduces air resistance. It produces faster swing speeds for bigger smashes and gains outstanding reviews from strong players that are looking for maximum power. 
Li-Ning COMBAT rackets have a heavier head and a higher balance point. Suitable for very strong, aggressive players looking for MAXIMUM power. 
The 3D Calibar Technology Platform uses a 3-digit numbering system. The first digit determines the grade of the racket as follows: 
If the first digit is 1, 2 or 3, the racket is suitable for beginners.
If the first digit is 4, 5 or 6, the racket is suitable for intermediate players.
If the first digit is 7, 8 or 9, the racket is suitable for advanced players.