MECO 12x Training Black Goose Feather Shuttlecock Badminton Balls Birdies Game Sport 12PCS Black Goose Feather Shuttlecocks Badminton Enables fast volleys and ensures flight consistency Crafted using good-quality goose feathers with a durable foam head of this White Badminton. Ideal for practice and casual playing Speed Rating: 79 Weight: Approx 6g (Each one)