The Ashaway Zymax 69 Fire is a durable badminton string providing high repulsion, explosive power & an excellent feel. It features a gauge of 21 (0.69mm) & prevents tension loss during stringing & restringing thanks to ZWV (Zy Weave) technology. The string guarantees reliable performance & uses revolutionary Beta Polymer technology delivering added strength, as well as enhanced elasticity & dynamic stiffness. It is supplied as a set that is 10m (33ft) long.