The Gamma Live Wire Professional 1.32mm tennis string set is 12.2m (40ft) long & features an advanced string construction with 50% more Iso-elastic fibres, NCP Tension fibres ensuring longer tension maintenance, as well as new PEEK abrasion resistant fibres which are woven within the outer wraps to provide enhanced durability. The string set offers the Live Wire Multifilament technology & guarantees gut-like performance. It ensures a crisp, solid feel ideal for professionals & has a gauge of 16 (1.32mm).