Bayer Seresto Flea & Tick Collar Large Dogs 8 Months ProtectionSeresto collar for dogs provides 8 months of continuous flea and tick prevention Seresto collar works through contact, so fleas and ticks dont have to bite your dog to die Seresto flea treatment for dogs also aids in the treatment and control of sarcoptic mange and kills lice Seresto dog collar is vet recommended flea and tick prevention for dogs in a convenient, odorless, non greasy collar; No need for messy monthly treatments. EPA Registration