Features: Connect truck and power supply for trailer signal display. One of the lines contains three lines of red, green and brown, and the other line contains black, blue, yellow, white 4 lines, white lines with terminals. Standard European car trailer connector, widely used, for commercial vehicles, semi-trailers, trailers. Pure copper contact, good conductivity, fast connection, beautiful appearance, easy to use. Use this 7-pin to establish a secure connection between your tractor and trailer. The black plastic socket has a corrosion-free, shock-resistant internal design that eliminates short circuits. Connect the main vehicle and the additional trailer; transfer the vehicle to the trailer. Specification: Condition: Brand New Item Type: Trailer Socket Color: Black Shape: Round Material: ABS + Copper Flat Wire Outer Diameter: Approx. 1cm/0.4in Cable Length: Approx. 1.5m/59.1in Package List: 1 x Connection Plug 1 x Instruction Manual 6 x Blue Connector 3 x Drawstring 1、Connect truck and power supply for trailer signal display. 2、One of the lines contains three lines of red, green and brown, and the other line contains black, blue, yellow, white 4 lines, white lines with terminals. 3、Standard European car trailer connector, widely used, for commercial vehicles, semi-trailers, trailers. 4、Pure copper contact, good conductivity, fast connection, beautiful appearance, easy to use. 5、Use this 7-pin to establish a secure connection between your tractor and trailer.