The 4-Way Flat Trailer Wiring Connector with Splice Connectors is the quickest and easiest way to make electrical connections between your vehicle and trailer when towing. The 4-Way flat (vehicle end) provides 48 in. of 18-gauge bonded wire that provide stop, turn and tail lights. Includes splice connectors and an LED light tester. Features an ergonomic, durable plastic construction that is corrosion-resistant to withstand extreme weather. For the safest towing, ensure all functions are properly equipped.