The Liberty 50 Plus IGR Flea and Tick Topical Treatment for Dogs kills and repels 5 different kinds of pests on dogs! This flea and tick treatment is formulated with a combination of 50% permethrin and sunlight stable IGR that kills, repels or prevents re-infestation of fleas, flea eggs, flea larvae, ticks, mosquitoes, lice and mites on dogs for up to 8 weeks! The flea and tick prevention package contains a 3 month supply. The flea, tick and heartworm prevention also weighs 0.46 fl. oz. Protect your pet from harmful pests and promote their wellbeing by bringing home this dog flea and tick treatment.