The Ashaway Flex 21 badminton string has 2, 000 multifilaments in its central core for enhanced resiliency, & tough, braided wear layer for longer string life. The string provides AFC coating that ensures easy stringing & superior durability. It is designed for top amateur & professional players. The string has a gauge of 0.75mm & is supplied in 200m reel, which is enough for 20 re-stringings.