Yonex badminton string bg65 titanium set this yonex badminton string bg65 titanium set has a compound of cup stack carbon nanotube coating reduces friction between the main and cross strings and combined with the 096mm gauge a high intensity multifilament nylon provides increased durability with a solid feel this string is the next generation of string producing power and durability badminton string hard feeling material construction core high intensity multifilament out