Kawasaki 12-Pack Intact Dack Feather Badminton Shuttlecocks with High Stability, Profession Badminton Balls Model 20 Speed 7812 shuttlecocks per pack Carefully crafted from natural Duck feathers, coupled with a strong cork head, increase stability, reduce air resistance, and have higher durability, which makes our shuttlecock an ideal choice for leisure and professional use Advanced Manufacturing Technology The head of this set of badminton is made of advanced cork technology The sound of hitting is very clear, which is conducive to stimulating players to enter the