Gamma synthetic gut wearguard is an excellent non polyester string with solid centre core and two outer wraps with wearguard spiral for great performance, comfort and durability in white.Made in Japan Available in 15g, 1.35mm,16g 1.32 mm and 17g, 1.22mm, suitable for tennis, squash and racketball stringing. 660ft reel for £65.00. 38ft set for £6.00