The Luxilon 4G Rough 125 tennis string has an enhanced construction with a textured surface that delivers extra spin. This gold monofilament string ensures excellent playability & maximum tension maintenance without compromising on durability. A dented surface of the string increases flex, which results in added power potential. The Luxilon 4G Rough 125 has a gauge of 16L (1.25mm) & is supplied in a 200m (660ft) reel.