Gauge: 17/1.20 16/1.30 17/1.20 Soft feel for optimal performance Consistent tension Textured for spin and grip Solinco X Natural Tennis Strings provides an exceptional blend of power, stability, and comfort. It employs a distinctive mix of high modulus fibers and a proprietary thermoplastic polyurethane resin core, offering an ultra-soft feel for optimal performance. This Solinco string set not only enhances power and comfort but also ensures excellent tension retention, even during intense matches. Moreover, its rough texture amplifies spin and bite on the ball, pushing the boundaries of what's achievable on the court.