EXCELLENT FOR ALL KINDS OF RACKET: Yonex BG-65 String is excellent for all kinds of Racket. SUPER -FINE DIAMETER: Yonex multifilament features a super-fine diameter for high durability and a soft feel on impact EXTREME DURABILITY: Yonex Bg String provides extreme Durability. LENGTH: 10m (33 ft) / GAUGE: 22 HIGHLY TRUSTED: Its all-around performance is highly trusted by world's top players.