Your pets are family and PetArmor helps you confidently care for your dogs especially when it comes to flea and tick control. PetArmor Plus collars conveniently provide vet-quality, head-to-tail protection without the expense of a vet visit. Each one size-fits-all dog collar works to kill fleas and ticks, even ticks that may transmit Lyme disease, for six months. This flea and tick treatment for dogs also kills fleas, flea eggs and flea larvae, helping to prevent flea infestations. This tick and flea treatment for dogs is both easy to use and waterproof, designed to provide a more secure fit.Kills fleas and ticks for six months (per collar)Prevents new flea infestationsOne size fits all dogs