(Destron Fearing) DuFlex ear tags are molded from patented flexible polyurethane for rugged, lightweight tags in bright, fade-resistant colors. 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. 3-3/4” high x 2-1/2” wide.