Hartz UltraGuard Pro Flea & Tick Collar for Cats and Kittens 7 Month Flea Tick
How to Apply: UltraGuard Flea & Tick Collar for Cats. Step 2 Ensure that two fingers fit comfortably between the collar and your cat's skin. Adjust the buckle if necessary. For use on adult cats and kittens 12 weeks of age and older.