Wilson NXT 16 Tennis String Black Color_Black Yonex’s Polytour Rev comes with

Yonex’s Polytour Rev comes with SIF (silicone oil infusion) -- SIF Technology with a unique pentagonal structure allows the string to move faster than conventional models

every point at the US Open has been scored with a Wilson US Open tennis ball

the VELOCITY MLT is a great durable power generator for tournament or club players

Recommended for players: Players who wants a lot Spin

Balls are numbered to differentiate from balls used by other players on neighboring courts

Wilson NXT 16 Tennis String Black Color_Black Yonex’s Polytour Rev comes withWilson NXT 16 Tennis String Black 1 Set Comfort Featuring proprietary xycro microfibers impregnated with PU for enhanced comfort and power, NXT is the world's most popular multifilament string. Sporting a larger sweet spot than traditional synthetic gut string and a fraction of its shock, NXT has stood the test of time for good reason. For installation, handle gently and avoid over clamping and crimping. 35% PU by volume. X bonded core increases