Description:

4 Way to 5 Pin Flat Adapter: The electrical wiring adapter converts a 4-way flat vehicle socket to 5-way flat boat trailer plug, adding in a fifth wire for the reverse lights and allowing vehicle's 4-way flat to be converted into 5 pin socket.
Design For Boat Trailer: 4 pin to 5 pin flat trailer plug specifically intended for boat trailers with surge brakes, 4 way flat to 5 way flat fits all vehicle models with 4-way flat connector, and your Boat trailer comes with a 5-way flat plug.
Well Protected: Both of the 4 way male and 5 way female trailer connectors equips with rubber dust cover, protects the terminals from water and dust when not in use.
Simple Installation: The blue wire spliced into the reverse light wire on the vehicle, 4 to 5 boat trailer hitch wiring adapter simply plugs into a standard vehicle-side 4 pin flat and trailer-side 5 pin trailer light adapter.
Construction: 4 pin flat 5 wire harness kit are molded and features thickened PVC wire coating materials for anti-corrosion, pure copper wires for good conductivity.