Python Magnum Insecticide Ear Tags are synergized pyrethroid tags containing 10% zetacypermethrin plus piperonyl butoxide. Python Magnum Insecticide Ear Tags have up to 62% more stopping power than similar tags. Python Magnum Insecticide Ear Tags control horn flies and aids in the control of face flies, stable flies,and house flies for up to 5 months. Also helps control biting lice and sucking lice for up to 3 months. Only one tag per animal to provide protection for beef and dairy cattle as well as lactating dairy cows. Apply with the YTXIS102 Ultra Tagger Compace. Calves under 3 months should not be tagged due to ear damage. Color: blue.