【[Durable】- 2/10-1/12-4/14 wire gauge, with weatherproof and moisture-proof flexible plastic shell; Note: The 6-foot (1.8m) extension includes the length of wire and junction box. 【Easy trailer wiring kit】-There is no need to guess when connecting the trailer to the vehicle using the 7-way trailer line pigtail in-line trailer line; Send electric light signals to campers and trailers to ensure safe travel 【Color coding for quick installation】- 7 groups of trailer boxes have color coding studs for connecting ground wire (white), 12V charging wire/auxiliary wire (black), reversing light (yellow), left brake light and turn signal light (red), right brake light and turn signal light (brown), tail light (green) and electric brake light (blue) 【Replace the old trailer junction box】- Each 7-pin trailer connector has identifiable marks and different colors to facilitate the simple and safe installation of the RV and towing hook 【Year-round use】- The trailer harness shell has the weather resistance of 40 degrees Fahrenheit (105 ° C) dry and 15 degrees Fahrenheit (60 ° C) wet; 7-pin trailer plug wire kit is applicable to motor homes, trailers, campers, caravans, trucks, food trucks and other tractors 7-way trailer plug