JinQue J-103 Top Training Grade Feather Shuttlecocks JinQue J-103 is made of A grade duck feather and natural cork. It has stable flying, good firmness, feeling, and good function with price proportion. So consumers can enjoy the greatest interest of playing badminton. Targeted for usage in training and competition, professional processing, flying stably and good firmness Flight: B, Durability: B+, Consistency: B Speed Mark: 78, Quantity: 1 dozen per tube