Yonex POLY TOUR DRIVE tennis string is a long-lasting, high-power polyester string that retains performance with minimal drop even after the punishing impact from big swings. Players that hit big will enjoy the PolyTour Drive for its durability and minimal tension loss. This 8-sided string enables aggressive players to attack with confidence. Gauge: 16L (1.25 mm)Length: 660 ft (200 m)Composition: Co-polyester MonofilamentColor: Flash Yellow