... , by multiple silk 4.0.68mm Flexpro brand badminton string FB-85 Typebadminton string FB-85Material:Top grade nylonDiameter0.68mmLength10mStringing Lbs24-30lbscolorssilver/blue ... , badminton rackets, and tennis, shuttlecocks; every kind of high, medium stringing machines, screen wires, strings, grips; and every kind of professional sports ...