Premium Performance: 7-way copper plug trailer cord with excellent electrical conductivity, has flame retardant performance, safe to use. PVC jacket, waterproof and weatherproof, able to adapt to various harsh environments. Outstanding Build Quality: The junction box is rectangular with low profile (2.2 inches) (6.5 inches x 3.1 inches). Made of ABS housing, which is impact resistant, toughness and durable. And comes with 4 open and 4 closed rubber grommets and 2 screws. Easy to Use: 7-way copper blade molded into a heavy-duty plug and 7-color wire identification markers for simple and safe installation. NOTE Maybe your trailer color and situation should not match, please confirm the wiring diagram first. 7 Pin Trailer Plug Cord: Essential when connecting and using your trailer in winter, especially in northern climates where ice, snow, and road de-icing chemicals are hard on the trailer cord connector ends. When the trailer is parked or not in use, remove the cord and store it