Six month supply. Prevents & treats flea infestation on cats. For use only on cats & kittens over 9 lbs. and over 8 weeks of age. Once a month treatment. Kills fleas. flea eggs and flea larvae. Fragrance-free. Kills fleas even if your cat gets wet. Breaks the flea life cycle. Contains the active ingredients in Advantage II (This product is not manufactured or distributed by Bayer Healthcare LLC, the makers of Advantage II). If you have questions or comments about this product, please write: Tevra Brands Pet Owner Response, 9100 F St, Ste 200, Omaha NE 68127. In Case of Emergency, call 1-800-775-9416. Non Emergency call: 1-844-276-3290.