Feather Shuttlec # JET 50 (Professional competition) Cigu Duckfeather 1st class Imported cork head weight: 4.7-5.2g spead: 75,76,77,78,79,80 packing: 1dozen/tube, 50tubes/ctn Remark: 1, all feather sorted out by feather-pick-machine to keep 16pcs feather of one shuttlecock in same curvature, make the shuttlecock stable flying, accurate drop spot. 2, special glue to enhance the feather durability