First Class Normal - 100% Polyester - Pack of 100 Strings A favorite string of professional players all over the world Good for all style of yoyoing Strings are between 120 and 125 cm in length. These strings do not come knotted, so you must tie your own finger hole. Kitty String is a world-class yo-yo string company that provides premium quality yo-yo string First Class Normal - 100% Polyester A favorite string of professional players all over the world. Good for all style of yoyoing. Recommended even for beginners. Traditional sized and perfect for thinner gapped yoyos, such as responsive or looping yoyos, or yoyos will smaller bearings that may experience snagging with thicker strings Strings are between 120 and 125 cm in length, so they are a good choice for those who like longer strings. In anticipation of being cut to a specific length, these strings do not come knotted, so you must tie your own finger hole.