Ashaway UltraNick 18 offers a thin, powerful, and durable squash string with a softer feel than Ashaway PowerNick strings. UltraNick 18 measures 0.1 mm thinner than UltraNick 17 for even more power and control. Featuring Ashaway's Zyex multifilament core construction, power and resilience are key features of the string. The braided surface maximizes control and increases spin while preventing tension loss. It is recommended by Ashaway that UltraNick 18 be strung at a tension of 10 - 20% less than standard squash strings.