NOTE: The Numbers on the ear tag are for laser printing(not ink printing), not easy to fade, the numbers may be a little light. Please make sure it before you purchase. The color of the item may vary slightly due to photography. Ear Tag: Material: plastic Color: green, blue, yellow and orange Length of the tag : 50mm/1.96in Width of the tag: 18mm/0.71in Weight: 350g/12.34oz(1 set) Ideal for breeding population, epidemic prevention and control, meat quarantine, all the field of information management for animals and livestock. Design for small size livestock or animals, such as sheep, goat,deer, dog, and so on. Package Content: 1-100 Number Green Ear Tag(including 100pcs tags+100pcs backs) 1-100 NumberBlue Ear Tag(including 100pcs tags+100pcs backs) 1-100 Number Yellow Ear Tag(including 100pcs tags+100pcs backs) 1-100 Number Orange Ear Tag(including 100pcs tags+100pcs backs)