The Head Megablast 1.25mm racketball string set is 12m (40ft) long, which is enough to re-string one racket. The Megablast has a multifilament centre core with co-polymer braided multifilament wraps which creates a highly elastic "snap-back" string that can deliver maximum power without compromising on comfort. It also features a slightly textured carbon co-polymer coating that ensures extra durability and less string movement. The Megablast racketball string has a 17 (1.25mm) gauge.