The Ashaway Zymax 66 Fire Power badminton string is designed for players searching for explosive power & excellent tension maintenance. This durable multifilament string has a gauge of 22 (0.66mm) & gives you optimum toughness, enhanced elasticity & dynamic stiffness thanks to the Zy Weave core & a revolutionary BETA Polymer material. It is supplied in a set that is 10m (33ft) long.