Wholesale Cat Flea Collar: Hartz UltraGuard Reflecting Flea & Tick Collar for Cats and Kittens kills fleas and deer ticks, that may carry the organism which causes Lyme Disease. For continuous protection, under normal conditions, replace the collar every 7 months. The collar kills fleas and ticks for 5 months and aids in their control an additional 2 months. It is water resistant and reflects direct light up to 300 feet. It is a break-away collar, and can be worn with a regular collar. Do not use on kittens less than 12 weeks of age. To activate collar, just hold the collar at each end, stretch, and it's ready to go. Don't take a chance with your pet's safety. Protect your kitty during the out door seasons. Made in the USA. Each package contains 1 collar that weighs ..53 oz. There are 6 collars to a case.