6 month supply. Unoponed box of four, plus two unboxed, unopened doses. Flea protection for small cats weighing 5 to 9 pounds, at least 8 weeks of age. Easy-to-apply monthly topical treatment. Delivers total flea protection and kills adult fleas, flea larvae and flea eggs through contact. Fragrance-free formula is waterproof after 24 hours of application.