Feature●Yonex Exbolt 63 0.63mm Badminton is a forged fiber string which allows up to 24% more durability.●The characteristics of Exbolt are enhanced repulsion, durability and hitting sound.●Forged Fiber is a high intermolecular bonding force which increases strength by removing any impurities during manufacture and then stretches it many times over the original material.●Exbolt is a resilient string with a comfortable feel.●Length: 10m, Gauge: 0.63mm, Colour: BlackDescription Yonex Exbolt 63 0.63mm Badminton is a forged fiber string which allows up to 24% more durability.