1.7 Pole Junction Box 8FT: This 7 pin trailer wiring plug with junction box kit allows you to upgrade from trailer with 4way, 5way, or 6way connector to a 7way connector for powering trailer interior or exterior lights 2.Transparent Surface Box: 8 Feet 7Way cord junction box design with clear lip for better wire observation; Clear cover helps fast and direct way to see the operation of the wiring harness; Unique bright yellow color makes it stand out among other adapter cords, quick and easy to find 3.Built to Last: Wellbuilt molded 7 Prong RV Blade trailer plug made of 1014AWG UL62 Standard Pure Copper Wire, UVresistant polyvinyl plastic sleeve that serves as protection from outdoor elements; Weatherproof, heavyduty plastic protects wires and terminals from the elements 4.: Prewired, 7way, bladestyle, trailerend connector box adds convenience to your trailer towing project, ing a fast and easy way to help you wire up your trailer; This cord has colorcoded functions marked for each wire