HARTZ UltraGuard Flea & Tick Collar for Dogs, up to 26" Neck, 1 Collar (7-mos. supply) - Chewy.com
Hartz UltraGuard Reflecting Flea & Tick Collar for Cats and Kittens, 7 Months Protection - Walmart.com
Amazon.com : Hartz UltraGuard Flea & Tick Collar for Dogs and Puppies - 26" Neck, 7 Month Protection : Pet Flea And Tick Collars : Pet Supplies
Hartz UltraGuard Plus Flea & Tick Drops 5+ Lb Cat 3 Ct (3270010844.2) | Rural King
Amazon.com : Hartz UltraGuard Flea & Tick Collar for Dogs and Puppies, 7 Month Flea and Tick Protection and Prevention Per Collar, White, Up to 15 Inch Neck : Pet Flea And