TECTONIC 9 5U adminton rackets are built on the TECTONIC Technology Platform and are produced from a special light weight T1100G carbon fiber that delivers incredible recovery times and strength. This high-modulus carbon fiber offers substantial performance improvements over other carbon fibers and can be found in aircraft structures, rocket launchers, high end sporting goods and more! Li-Ning COMBAT Series badminton rackets have a heavier head and a higher balance point. Suitable for very strong, aggressive players looking for MAXIMUM power.