Python Magnum insecticide ear tags for cattle are synergized pyrethroid tags containing 10% zetacypermethrin plus piperonyl butoxide. Aids in the control of face flies, stable flies and house flies up to 4 months. Controls biting lice and aids in the control of sucking lice for up to 3 months. Approved for use on beef and dairy cattle, including calves and lactating dairy cows. Use 1 tag to control most strains of horn flies for up to 4 months and pyrethroid-susceptible strains of horn flies up to 5 months. Color: Blue