12pcs Badmintons Duck/Goose Feather Cock/Foam Head Shuttle Cocks Shuttlecocks Set Badminton Ball Game with Storage Tube
This set of precision-manufactured shuttlecocks ensures a perfect-fit speed, distance and stability performance. It is made of good qualitative duck feather with cork base. The shuttlecock rotates in a controllable speed of 350 to 420 revolutions to make sure a stable flight. A wonderful set for professional badminton training or amateur badminton playing.
Features:
Proper speed, and Aerodynamic stability and strike performance.
High quality durable duck feather skirt with cork base.(for M7)
The rotation speed controlled in 350 to 420 revolutions, provides smooth flight.
Perfect for beginner and amateurs badminton training sports.
Lightweight, high cost performance, and admirably stable.
Specifications:
Color: White
Model: M7 / M10 (Optional)
Skirt: Duck feather / Goose feather 
Base: Cork / Foam
Speed: 76 
Rotational velocity: 350-420 revolutions
Weight: 4.7-5.5g (one piece) 
Package weight: 179g, 6.3oz / 171g, 6.0oz
Package List:
12 * Badminton Shuttlecock