Z Tags 1-Piece Pre-Numbered Hot Stamp Tags for Calves, Numbers from 51 to 75, 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