Adjustable leg ring: The foot ring features six buckles with an inner diameter of approximately 2–2.4 cm. The ankle ring can be adjusted according to the animal's leg size. One ring is sufficient for use without replacement. Easy-to-identify leg ring: Each set includes 100 solid color rings numbered 001–100, allowing for clear identification of different poultry. Ideal for classifying various ages, breeds, roosters, and hens. Safe and reusable: Made from high-quality plastic material, these rings are durable, safe, and easy to assemble or disassemble. Numbering and color strips remain clear and visible, making it easy to identify chickens, ducks, and other poultry. Suitable for use with chickens, ducks, hens, and similar birds.