SENTRY(R) Advance Guard2??? for Cats Flea & Tick Control 4-Month Supply This once-per-month topical flea treatment is for cats and kittens 8 weeks of age and older. It starts working through contact to kill fleas, flea eggs, and flea larvae, providing 3-way protection. Advance Guard2 contains Imadacloprid and Pyriproxyfen, which are also used in Advantage II. Features: Contains same active ingredients as Advantage(R) II Kills fleas within 12 hours of application Controls existing flea eggs and fleas and prevents future infestation Waterproof; remains effective after water immersion or exposure to rain Item Specifications: Active Ingredients: Imidacloprid 9.10% Pyriproxyfen 0.46% Other Ingredients: 90.44% Total: 100% Net Contents: (4) 0.027 fl oz. (0.8mL) applicators Over 9lb 3950 409348 73091039501