3 month supply. For use only on cats & kittens over 1.5 lbs and over 8 weeks of age. Contains fipronil 9.70%. Kills fleas, ticks & chewing lice. Fast acting, long lasting. Waterproof. This product provides three way protection that kills fleas, ticks, and chewing lice. Kills deer ticks that may transmit Lyme disease. Kills brown dot ticks, American dog ticks, and lone star ticks. Prevents flea reinfestation for 4 weeks. If you have questions or comments about this product, please write: Consumer Response, PO Box 540224, Omaha, NE 68154-0224. In case of emergency, call: 1-877-416-7330, non-emergency call: 1-888-814-4738 (4PET).