The head pwr fusion 130mm tennis string set provides players with excellent power and comfort ensured by a unique construction comprising of four polyamide monofilament fibres at the core that are surrounded by multifilament layers this special construction increases dampening and reduces tension loss to provide the player with an enormous shot power a soft feeling and a superior comfort the set is 12m 3937ft long which is enough to re string one racket and has a 16 130mm gauge