CyLence Ultra Ear Tags from Bayer are for use on beef and dairy cattle, including lactating cattle, to control face and horn flies (including organophosphate-resistant populations), and gulf coast and spinose ear ticks. CyLence Ultra Ear Tags use new fiber technology, FyberTek, to put more active ingredient into a single tag. Contain 8% beta-cyfluthrin and 20% piperonyl butoxide. For optimum control (up to 5 months), use 2 tags per mature animal or 1 tag per calf. For adequate control, use 1 tag per mature animal. Use Allflex Universal Total Tagger. Blue tag.