The Tecnifibre ATP HDX Tour is a multifilament tennis string offering polyurethane fibre & ensuring less muscular fatigue. It is suitable for rackets that weigh less than 300g (10.6oz) & designed to provide players with great flexibility, power & precision. In addition, the PU HD Inside Exclusive Process guarantees a solid touch, longevity & excellent shock absorption. The set is enough to re-string one racket.