FEATURES: Featuring proprietary xycro microfibers impregnated with PU for enhanced comfort and power NXT is the world's most popular multifilament string X-bonded core increases tension maintenance and power Players can continue to generate great pace on the ball for longer periods of time 10% larger sweet spot than traditional synthetic gut string A fraction of the shock compared to traditional synthetic gut string 16 gauge string is slightly thicker than the 17 gauge, enhancing durability and control For installation, handle gently and avoid over-clamping and crimping