2 v w6 N; ^* u2 s! g / @" J- f7 w4 I0 Z# Vdepends on the weight of the racquet, 2u or 3u. * b: f) ~( Z3 Q' m5 L+ b K' I# wjust by browsing any online store, you can find that info. 3 k0 @3 J9 P+ a+ Jie. xin lan tian(in chinese) or mybadmintonsotre.com