PYthon II Dust is an exclusive formulation that contains a flow control agent to deliver a consistent supply of insecticide and will not harden in dust bag if it gets wet. It is the first "ready to use" synergized insecticide dust for season long control of Horn Flies, Face Flies, Stable Flies, Ticks, Keds, Lice and other nuisance flies. Approved for use on beef and dairy cattle, can be applied to any age of animal, and is an odorless formulation. | Y-Tex PYthon II Dust Kit 2 Refills