TriForce Canine Squeeze On is a 12 week supply. Contains cyphenothrin, the newest EPA approved chemical for complete 4 week control of adult fleas, ticks, and mosquitoes in a single application. Kills flea eggs and larvae for 9 weeks. Kills and repels fleas in as little as 1 hour! Kills and repels ticks in as little as 3 hours! New absorption technology provides a wide safety margin for your pet. Contains Nylar, the preferred IGR for control of flea eggs and larvae. Safe for dogs and puppies 12 weeks of age and older. Do not use on cats.