【[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