The luxilon 4g 130 tennis string is designed to enable long lasting high level play it ensures improved comfort and longer playability when compared to many other polyester strings and has a monofilament core that makes it firm and durable this gold co polyester string provides unmatched power and spin suitable for aggressive players without compromising on comfort and tension maintenance it has a gauge of 16 130mm and is supplied as a 122m 40ft set suitable for stringing one racket