Wholesale Dog Flea Collar: Hartz UltraGuard Reflecting Flea & Tick Collar for Dogs and Puppies 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" Case Pack 6 Please note: If there is a color/size/type option, the option closest to the image will be shipped (Or you may receive a random color/size/type).