Great for players seeking more durability without hindering control and touch, the Ashaway SuperNick ZX Micro squash string set boasts a multifilament nylon core for enhanced precision and impeccable shot sensation whilst the ZX wear layer with Zyex filaments ensures the robustness of the string. This 18-gauge (1.15mm) string maintains the tension for much longer, its truly made in the USA, and supplied in a 9m (30ft) set.