Z Tags 1-Piece Pre-Numbered Hot Stamp Tags for Calves, Numbers from 1 to 25, Purple Tag design ensures that the back of the tag will not snag and pull out or break off Exclusive self-piercing tag tip makes a clean, precise incision to prevent infection and promote faster healing Flexible tag material resists snagging on wire or brush Hot Stamp offers bold, black, easy-to-read numbers Numbers stamped deep into each tag