+ H. {% i" {. u# q6 @/ V' @, s1 L. i- B* l8 S
depends on the weight of the racquet, 2u or 3u. + F! B/ @. t8 p6 \just by browsing any online store, you can find that info. ( \3 b0 p6 x# {+ ~" I2 I U) `ie. xin lan tian(in chinese) or mybadmintonsotre.com