Each tag includes a male button for attachment.OPtimizer® is an economical organophosphate tagcontaining 21% diazinon and performs well in areaswith horn fly pyrethroid resistance. Controls horn flies,Gulf Coast ticks, spinose ear ticks, lice and aids in control of face flies up to 5 months withtwo tags per head. Approved for use on beef and non-lactating dairy cattle. Ideal for rotationwith PYthon® to help manage horn fly resistance to insecticides.