Cylence Ultra insecticide cattle ear tags are synergized pyrethroid tags that contain 8% beta-cyfluthrin and 20% piperonyl butoxide. Approved for use on beef cattle and dairy cattle, including lactating dairy cows. Use 2 tags per cow for effective control of face flies and pyrethroid susceptible horn flies for up to 5 months, and to aid in the control of Gulf Coast ticks and spinose ear ticks. Use 1 tag per calf. Apply Cylence Ultra insecticide tags with the Allflex Universal Total Tagger. Ear damage may result if used in calves less than 3 months of age.