Prozap Backrubber and Pour-On Extra 2.5gal; Ready-To-Use synergized insecticide to be applied as a pour-on or with the use of backrubbers to livestock. Contains 0.125% Permethrin and 0.125% PBO. For use on beef cattle, dairy cattle (lactating and non-lactating) and swine Controls flies, mosquitoes, ticks, and lice