Shop Nilight RV 7 Pin Trailer Plug Splice-in Replacement Heavy Duty Trailer Side Male End 7 Way Round Splice Receptacle Replacement Plug for Tow Hitch Car RV Boat Truck in high quality, support 2 Years Warranty. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this 7 pin electrical plug. 7 way female trailer plug features 2 handle hooks on either side of the plug for a better grip when plugging in or unplugging trailer wiring.