The Yonex BG Aerosonic is a multifilament badminton string made specifically for players who want high repulsion, razor sharp swing & a hard-hitting sound. It features a gauge of 0.61mm (22GA) & has been constructed from High-Intensity Nylon Multifilament for greater durability, as well as High Polymer Braided Nylon for exceptional all-round performance. The string boasts Compact Field Structure technology for increased strength & comes in a 200m (656ft) reel.