Same great comfort and forgiveness as the super popular 850 with a twist literally. A "Power-Spin Coating" added to the outside wrap of the string adds a big boost of ball feel along with spin ability. Great option for the player looking for that added control and feel. Length: 39 ft. (12.2m) Gauge: 16 (1.32mm) Color: Pearl Natural Yonex Tennis String TS850P16