Already have an existing electric dog fence or want to expand your current system? We carry all the wire, flags and accessories you need to make your electric dog fence perfect for your needs. We have 18 gauge and 20 gauge standard wire for laying out the initial fence and twisted wire in 18g and 20g to cancel the signal where you want your dog to be able to pass through without correction. To complete your setup, you can add additional flags for the training phase and waterproof splices to make adding in additional wire easy.