Weight / Grip Size 3U / G54U / G5 String tension LBS ≤30 lbs(13.5Kg)≤29 lbs(13Kg) Frame Material High Resilience Modulus Graphite+Nano Fortify TR++HARD CORED TECHNOLOGY Shaft Material High Resilience Modulus Graphite+PYROFIL+6.8 SHAFT Response Product Details ARS-90K Frame Technology ARS-90K inherits the DYNAMIC-SWORD frame structure from ARS-90S and further makes adjustment to the sword structure in different directions. Now the swings can be smoother, faster, and downward shot is more effortless. To achieve both speed and agility, the frame is also designed with a big head and new NANO FORTIFY TR+ technology, and hence delivers lightweightness and sturdiness. ARS-90K Shaft Technology The perfect combination of WES and ANTI-TORSION SYSTEM delivers excellent handling experience and elasticity, enabling powerful attack with incredible stability. ARS-90K Brings Whole New Experience ARS-90K has the advantages from both Speed and Attack series. Many of the players from Malaysia and Denmark national teams have already chosen ARS-90K as their match rackets to prepare for Olympic Games Tokyo 2020.