(Allflex) Allflex A-Tag calf ear tags are one piece tags designed for easy application. A-Tags have a self-piercing pinhole tip to create a smaller incision for faster healing and reduced stress. Numbered ear tags are printed in high contrast Allflex Laser-Ink Marking. Underneath a dark ink overlay is the matching laser number etched permanently into the surface of the tag. The laser markings are guaranteed not to fade for the lifetime of the animal. Allflex A-Tags are made from polyurethane, making them completely waterproof, tough, durable and snag proof. 3.875" high x 2.5" wide.