Yonex bg80 badminton string set this yonex bg80 badminton string set is a high modulus vectran fibre which is an advanced material wrapped around a strong multifilament core of bg80 its ultra thin 068mm gauge gives players greater power for smashes this string gives a hard feeling and is designed for the hard hitters badminton string bg80 thickness068mm strong hard feeling designed for smashes yonex branding yellow