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Bio Spot Flea & Tick Collar for Cats kills fleas for up to 8 months and ticks for up to 6 months. Bio Spot Flea & Tick Collar for Cats also contains insect growth regulators which prevent flea eggs from maturing.
The active ingredient propoxur is an insecticide that kills both fleas and ticks. Methoprene is a chemical that kills flea larvae and pupae, ending the flea's life cycle and preventing further infestations.