The ATag™ Cow designed for long term application as a one piece option. It is self-piercing with a pinhole tip, which means faster healing and reduced animal stress. The ATag™ Cow has high retention, especially in thick eared animals due to a longer tag anchor. Dimensions: 3in W x 4.5in H. 25 per package. ATags fit the ATag™ One-Piece Applicator (yellow)# 120732.