Item Type: Tennis Racket String Material: Polyester String Length: Approx. 12m / 39ft String Gauge: 1.3mm / 16gauge (0.05in / 16gauge) 1、Hex Shape Rotating: Hex shape rotating string, high grade polyester tennis racket string, the surface is roughened to bring more rotation.  2、String  Length:    The length of the tennis racket string is about 12m / 39ft, which is enough to use the length of a regular tennis racket.  3、High Temperature Treatment: High temperature treatment to form a twisted polyester string that provides good rotation, strength and control.  4、Stable Tension: The tennis racket string method improves its tension stability, providing excellent comfort and good topspin.  5、Wide Use: The overall design is very good for players looking for topspin. It is suitable for tennis enthusiasts, training, competition, etc.