Use only on dogs and puppies over 12 weeks of age. Do not use on cats. To use: Snap or cut off top end, invert tube over dog and use open end to part dog's hair. Squeeze tube firmly to apply solution to dog's skin as directed on the package. 12-week supply (six .10 fl. oz. tubes). Active Ingredients: Cyphenothrin: 40% Pyriproxyfen: 2% Other Ingredients: 58% Choose the correct product based on the weight of your dog. Available for dogs weighing: 9-20 lbs. 21-39 lbs. 40-60 lbs. 61 lbs. & over