One-piece ear tag features a round pin hole and self-piercing, tapered tip for easy application with minimal stress to the animal. Promotes fast healing and tip design makes tag loading easy. Long tag anchor allows for excellent retention. Features long neck for greater visibility. Measures 3Wx4-1 2H.Laser ink marking provides high visibility in pen or pasture; d for life of the animal. Can fit up to 5 digits. 1-3 digit tags feature 1-3 4 numbers; 4 digit tags, 1-3 8 numbers; 5 digit tags, 1-1 8 numbers. Numbered sets of 25 available in orange, yellow or white.