Effective anti-flea collar. Collar for small dogs, collar measures 48cm. Composition: And diazinon excipient and colorant inert c.s.p. Directions: Prevention of infestations by fleas during 6 months. How to use: Adjust the collar, without squeezing, around the neck of the animal. Cut the excess of the collar leaving two fingers of slack between the collar and neck. The collar starts to be effective within hours of their placement. This necklace can be used to start from six months old. Contraindications: Do not use in cats. Do not use in sick or convalescing animals. Do not use in lactating females. Do not use in puppies less than six months.