The Ashaway Crossfire 17 tennis string is a hybrid of 100% braided aramid mains & synthetic gut crosses. The string has superior durability & a firm string bed for increased ball control. The braided Aramid mains provide superior spin. The string is recommended for top amateur & professional players with chronic string breakage problems. It is supplied in a 12m (39.4ft.) set, which is enough for 1 re-stringing.