1)- Usage: 13 pin plug and socket connector kit is used to connect the 13 pin trailer adapter plug to establish a safe connection between the vehicle and other trailers to transmit electronic signals and power supply. 2)- Material and standards: The 12V 13 pin trailer plug kit is made of hard plastic and copper. And passed RoHS and CE certification. The connector is water resistant and can be water resistant in all road and weather conditions. 3) - Installation: The metal mounting bracket of the socket can firmly install European style sockets to 13 pins and trailer. Installation of flexible trailer connector. Multiple screw holes provide flexible installation options, and complete screws and nuts are included for easy use. 4) - Note: Please be careful not to buy the wrong pin when purchasing, we can provide other 3 holes and 7 holes for you to choose. Please pay attention to check whether the packaging is intact and the accessories are complete. 5) - Service: Committed to an excellent shopping experience, if for any reason you are not completely satisfied with the product , let us know, we will give you the solution as soon as possible, please feel free to contact us if you have any question.