Big Banger Alu Power super polyester 17g, 1.25mm, soft string for comfort, control, power and durability, used by Roger Federer in his tennis racket and many more tour players to great effect. Available in Smooth or Rough version in Silver colour. 720ft reels for £170.00. Two reels for £330.00. 38ft set for £12.00. Made in Belgium.