5 m- c% x7 u+ R$ q% ~; [ . \# V1 e0 `( G! Gdepends on the weight of the racquet, 2u or 3u. ; M9 i& i' U# t& r' e9 x1 R: l, N4 e
just by browsing any online store, you can find that info. 0 ~+ [0 |1 T5 N& k! p: [ie. xin lan tian(in chinese) or mybadmintonsotre.com