Featuring proprietary xycro microfibers impregnated with PU for enhanced comfort and power, NXT is the world's most popular multifilament string. It's X-bonded core increases tension maintenance and power, so players can continue to generate great pace on the ball for longer periods of time. Sporting a 10% larger sweet spot than traditional synthetic gut string and a fraction of its shock, NXT has stood the test of time for good reason. This 17 gauge string is slightly thicker than the 16 gauge, making it a more durable option. For installation, handle gently and avoid over-clamping and crimping.