Solinco Hyper G is the string you should be looking for in you're in need of huge amounts of spin thanks to its square profile. This dynamic co-polyester string uses the latest in materials and design to give players the winning edge. The string has a unique square shaped profile. This results in exceptional bite on the ball for off the charts spin generation. Solinco made this string for a Top 50 ATP player looking for a string that wasn't too firm and wasn't too soft, yet was still able to take massive swings at the ball without overhitting. Construction: Co-polyester monofilamentColor: GreenLength: 40’ setGauge: 16G, 16L, 17G, 18G