7 Pin European Trailer Connector Socket Wiring Plug 2m Cable for Commercial Vehicles Semi Trailers Item Type: Trailer Connector Material: Copper+Aluminum Color: Black Shape: Round Type: Socket Line Length: Approx. 2m/6.56ft Main Function: Connect truck and power supply, suitable for trailer signal light display Outer Diameter of Flat Wire: Approx. 1cm/0.39in Wide One Wire Contains 3Red, Green and Black Wires, The Other Wire Contains 4 Brown, Blue, Yellow and White Wires, and the White Wire has Terminals