Bob Martin Clear Plus Spot on Flea & Tick treatment for Medium dogs (10-20 kg) 1 pipette ? Kills fleas for 8 weeks? Kills ticks for 4 weeks? Kills biting lice? Inhibits the development of flea eggs, larvae and pupae for 8 weeks? 1 pipette = 1 treatment? Prevents re-infestation of dog´s home environment? For dogs over 8 weeks oldDescriptionBob Martin Clear Plus Spot on Flea & Tick treatment is a solution for Medium Dogs (10-20 kg) over 8 weeks old, containing Fipronil and (S)-methoprene that kills fleas & ticks and inhibits the development of flea eggs, larvae and pupae after application, preventing the re-infestation of dog´s home environment.