Yonex BG-80 badminton string is made od a high-modulus Vectran fiber and is an advanced material wrapped around a strong multifilament core of BG80 for tension retaining. Its ultra-thin gauge of 0.68mm gives players greater power for smashes. Tension-retaining braided oval Vectran maximizes durability. An ultra-strong and durable Vectran-fibre string delivering excellent repulsion performance, a soft feel on impact and sensitive control. The 200 meter reel will string 20 to 23 rackets depending on usage. Each racket requires approximately 10 meter of string.