(Allflex) Allflex Global ear tags provide the latest innovations in livestock visual identification. Allflex ear tags are made from polyurethane, making them completely waterproof, durable and snag proof. Improved retention collar design and self-piercing male buttons for easy application and reduced risk of infection. Medium Allflex Global ear tags are for use in all livestock species, but particularly suited for calves, hogs, goats, sheep and ostrich. 2” high x 1-5/8” wide, 7/8” shaft, closed tip.