5 r( \9 Q( o) T. A0 v* Q+ t & N" x$ ]& d2 p4 D0 f- t! W3 sdepends on the weight of the racquet, 2u or 3u. 0 d/ X: a: i K% x( Y6 i8 a0 Rjust by browsing any online store, you can find that info. $ k; H: `; i0 D& w6 {9 h8 m- y& c Rie. xin lan tian(in chinese) or mybadmintonsotre.com