For Tournament training . stable flight and nice durability Badminton Features: 1) Material: super grade goose feather all-round feather-cut 2) Weight: 4.8 to 5.2g 3) Speed: 75, 76, 77, 78 .794) Fly status: A + stability5) Durability: 98%6) Package: 1doz/tube, 50doz/CTN 7) Measurement: 70*65*30CM 8) Delivery time: 10-30days9)Used for inernational competetion badminton