Shuttlecock and balls: The fastest moving objects in sport - Team Canada
ZHENAN 12-Pack Advanced Goose Feather Badminton Shuttlecocks with Great Stability and Durability,Indoor Outdoor Sports Hight Speed Training Badminton Birdies Balls
Do you get different speeds of shuttlecock in badminton? - Quora
Mavis 300 Nylon Shuttlecocks (Yellow Slow Speed)
Yonex Mavis 350 / Yellow/ Fast Speed / Nylon Shuttlecocks