(Destron Fearing) DuFlex ear tags are molded from a patented flexible polyurethane for rugged, lightweight tags in bright, fade-resistant colors. Standard numbered ear tags are printed with Dark and Durable laser ink. DuFlex self-piercing studs are specifically angled to create clean, small incisions. Studs are treated with patented Infecta-Guard, to reduce the risk of infection and disease transfer, and to facilitate proper healing. DuFlex ear tags are designed for easy application, superior retention, and reliable performance in harsh weather conditions. 4-5/8” high x 3” wide.