A synergized formula, concentrated dose, ready-to-use insecticide containing 7.4% permethrin and 7.4% piperonyl butoxide. Apply as a pour-on, mist spray, or back rubber to lactating and non-lactating dairy and beef cattle and calves to control lice, horn flies and face flies. As a pour-on: Apply 2 ml per 100 pounds body weight up to a maximum of 20 ml per animal. Use undiluted in a mist sprayer. No milk withholding or slaughter withdrawal times.