Yonex BG 80 Power 0.68mm is a fairly new string, centre core - high intensity nylon multifilament with Vectran, outer wrap - special braided high polymer nylon fibre.Excellent string for power and hitting sound, Available in Orange or White, hard feeling. Orange colour is slightly more popular than white colour. 660ft for £115.00. 33ft set for £7.00. Made in Japan.