Beaphar Soft Cat Flea Collar is a veterinary medicine that contains low levels of permethrin which is gradually released on to the cats coat over a four-month period to kill fleas. This comfortable fabric collar has been fitted with an elastic safety link. The safety link is designed to stretch if your cat gets caught while out and about, enabling them to slip their head out. The collar can also be adjusted to fit any cat. The Beaphar Soft Cat Flea Collar comes in a stylish sparkly finish and with an optional silver bell. Suitable for cats and kittens from 12 weeks of age. 95% of the fleas life cycle is in the home. When tackling a flea problem, in addition to treating your pet, it is recommended to use a household insecticide, such as Beaphar FLEAtec Household Flea Spray or Beaphar Household Flea Fogger for your home.UK AUTHORISED VETERINARY MEDICINE. SUITABLE FOR CATS AND KITTENS FROM 12 WEEKS OF AGE. ADJUSTABLE 30cm COLLAR: can also be adjusted to fit any cat. COMPLETE WITH AN ELASTIC SAFETY LINK: designed to stretch if your cat gets caught while out and about, enabling them to slip their head out. COMFORTABLE FABRIC COLLAR WITH A SPARKLE FINISH. KILLS FLEAS FOR UP TO 4 MONTHS: A veterinary medicine that continuously releases low concentrations of permethrin to kill fleas and prevent their return for up to four months.