Nalax Badminton Birdie,12-Pack Professional Duck Feather Badminton Shuttlecocks Feather Ball With Great Durability Stability and Balance,Suitable for Professional Training Or Family Outdoor SportsMaterial: The shuttlecock is elaborately made of 16 pieces of high quality duck feather, which is matched with high quality composite cork ball head. High intensity, good toughness, high accuracy. Let customer users have a good sports experience. High performance: Strict quality control birdies, 100% rotation and flight test, standard weight and speed, hold the accuracy of placement and control the rhythm of games easily. Multipurpose: You can choose