HARTZ Ultra Guard •••• FLEA & TICK COLLAR FOR CATS •7 Month Flea & Tick Protection •Kills: Fleas & Ticks • Water Resistant • Fresh Scent •Do not use on Kittens under 12 weeks of age This collar is designed to kill adult fleas, it starts killing as soon as it is placed around the cat's neck. Protection against fleas will be achieved within a few days and provide continuous protection for up to 7 months. Fully Adjustable, just cut to fit. Full protection against adult & immature ticks will be achieved within a few days, providing continuous protection for up to 7 months. Adult ticks will be killed over the entire pet. Dead ticks will fall off or may be easily removed.Hartz