The X-ONE BIPHASE string is the best performing in this range on the three criteria of playability, durability and integrity . String Wear Indicator: Know exactly when to restring—visible fraying at the sweet spot signals peak performance before breakage. Tecnifibre Strings: Crafted in France, the pioneers of multifilament technology. Delivering unmatched power, comfort, and lasting playability, Tecnifibre strings keep your game at its best, point after point. X-one biphase tennis string is the highest level of power and control. Recommended tension: Between 22 and 25 kg Maximum tension: 32 kg Not recommended for those who frequently break strings: (< 10 hours of play) Gauge: 16g/1.30 mm, 17g/1.24 mm, Length: 40 ft 12.2 m Composition: Polyamide, polyurethane, silicone finish Colour: Natural
