Hopkins 48" Vehicle Side 5 Flat Trailer Connector. Provides the basic lighting functions from the vehicle to power the trailer while adding the reverse function. This makes it the choice connector for those who have a surge brake equipped trailer or want to set up reverse lights on the back of their trailer. For use with marine type trailers equipped with surge brakes. Shrouded blue wire. Printed wire functions for easy wire reference. Meets SAE standards.