For use with both beef and nonlactating dairy cattle primarily for the control of horn flies Controls horn flies Gulf Coast ticks and spinose ear ticks Only insecticide ear tag on the market that contains 40 diazinons Effective against pyrethroid-resistant horn flies for up to five months Aids in the control of face flies lice stable flies and house flies For use with the Allflex Universal Total Tagger including red pins and black clips Not for use on this pest in California Optimum control attach 1 tag/ear 2/animal Adequate control attach 1 tag/animal 20 count ear tags per box 17415474.