Flea， tick， and chewing lice treatment for cats & kittens older than 8 weeks， and over 1-1/2 pounds. Delivers premium protection and a fast and effective treatment. Kills fleas on contact， kills all stages of ticks， and kills lice rapidly. Each tube prevents flea and tick re-infestations for 1 month. Each box includes 3 tubes， which is a 3-month supply. Waterproof formula stays on and doesn't rub off. Effective even after bathing and exposure to water and sunlight.