Features: OOTD Type Adopting high-quality material that is durable, non-toxic and expandable for long-term use. Reusable, easy to put on and remove. Keep different races apart. Bright colors and numbers make it easy to identify, they widely use these rings to identify similar looking birds. The metal chicken ring is worn on the feet of poultry and pigeons such as chickens, ducks, and geese. Model: 3.3# suitable for jade birds and hibiscus, 4# suitable for budgerigar, 4.7# suitable for peony parrot, 6# suitable for Xuanfeng and starling, and 7# suitable for Jintai and mynah. Specification:Type: Bird Foot RingMaterial: Aluminum AlloyApplications: For Small Poultry Pigeon Bird ChicksFeatures: Bird Foot Ring, Identify Dove Bands, Pet Training Birds Rings, Labels Delivery MarkDimension:3: app.3mm/0.12in3.3: app.3.3mm/0.13in4.7: app.4.7mm/0.19in8: app.8mm/0.31inColor: As the picture shownQuantity: 1 setNote:1. Please allow 0-1cm error due to manual measurement. Pls make sure you do not mind before bidding.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included: 50pcs x Bird Foot Ring