. O8 \* Q. g) Z; L$ Y8 F+ P5 L( E3 K
depends on the weight of the racquet, 2u or 3u. ) r. D5 ~/ w2 H4 I' o
just by browsing any online store, you can find that info. ) [6 q' M; e0 P7 ~, `; q0 M& z: @* p
ie. xin lan tian(in chinese) or mybadmintonsotre.com