[Packing: 100Pcs Green \u200bNL The number on the foot rings will be send randomly and those who mind will buy it carefully. Size:Inner Diameter(min):Approx. 8mm/0.4inch.Outer Diameter:Approx. 11mm/0.43 Inch.Height:Approx. 11mm/0.43 Inch. High-quality :Adopting high quality plastic + Aluminum material Durable，The pigeon ring is easy to disassemble and reuse. Quickly distinguish animals: These bright colors make it easy for you to find Pigeon birds the laser-etched numbers are not easy to smear。 It can help you quickly distinguish your Pigeon birds etc. Wide Application: the leg rings can help you to keep different breeds apart separating hatches mark suspected Pigeon birds etc.]