For direct animal use on beef cattle, and lactating and non lactating dairy cattle. Active ingredient 1% cyfluthrin, a pyrethroid, controls horn flies, face flies, biting lice and sucking lice. CyLence® Pour On kills and repels face flies, the mechanical vector of Moraxella bovis, the bacteria that causes “pink eye” in cattle. Ready to use; no mixing required. No meat withdrawal requirement. CyLence Pour On can be used on cattle of all ages.