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