Manufactured from exceptional, innovative BETA polymer fabric, the Ashaway Zymax 69 Fire badminton multifilament string provides unmatched durability & strength while maintaining proper tension throughout the complete usability period. Featuring Zy Weave core, the string ensures, perfect elasticity with excellent repulsion, while remaining durable in the most demanding circumstances. This 21 (0.69mm) gauge string arrives in 200m (656ft) reel.