Star Sport Co. is a factory dealing with Shuttlecock, Racket, Sports wears, Pillar net for competition, Carpet, Badminton nets, Score-board, Sports shoes in Vietnam. Our competitive price and compeletely service is best advantage of us. Specifications of shuttlecocks1) Weight: 4. 7 to 5. 2g2) Speed: 75, 76, 77, 78, 791-------48--------75: slow, for use in highland2-------49--------76: medium slow, for use in hotter area3-------50--------77: medium, most sea level area4-------51--------78: medium fast, cold area5------52---------79: fast, cold area, below sea level( 1grain = 0. 0648gam) 3) Fly status: stable4) Durality: good5) Packing: 12pcs / tube, 50tubes / ctn6) Ctn size: 70*35*40cm7) Gross weight: about 11kg