Badminton 1. Super duck feather shuttlecock badminton 2. 3 layers cork head 3. Good durability precise fall ... ,76,77,78,79,2,Weight: 4.7g--5.2g, Badminton Shuttlecock 3,Appearance:A 4,Durability: 95% 5,Flight Stability: A ... .Brand name: OEM2.Head material:3 layers,natural cork3.Feather material:A duck feather4.Fly:A5.Durability:A6.Speed:75~797.Weight ...