Hopkins Hoppy Plug-In Simple Adapters take the guesswork out of vehicle-to-trailer wiring. These pre-wired adapters allow the consumer to create a custom plug-in simple wiring system appropriate for any towing situation.For use with marine trailers equipped with surge brakes.Weatherproof splice connections.Bullet terminal and splice connector included.Retrofits existing 4 wire flat to a 5 wire flat.Easy to use and install.
