1Adapter provides secure connection in the vehicle side to power the trailer's signal lights. 27?pin connector, adopts pure copper contact for good conductivity and fast connection, reliable. 3Standard European trailer connector, widely used in commercial vehicles, semi trailers, trailers. 4Aluminum alloy socket, anti?oxidation and anti?corrosion, durable and sturdy. 5Simple installation, comes with the 7?way connector, mounting bracket and necessary accessory.1 x 7-Pin Connector Socket 6 x Blue Buckle 4 x Cable Tie Condition: 100% New_x000D_Item Type: Trailer Connector_x000D_Material: Copper+Aluminum_x000D_Color: Black_x000D_Shape: RoundType: Socket_x000D_Line Length: Approx. 2m/6.56ft_x000D_Main Function: Connect truck and power supply, suitable for trailer signal light display_x000D_Outer Diameter of Flat Wire: Approx. 1cm/0.39in Wide_x000D_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 1Adapter provides secure connection in the vehicle side to power the trailer's signal lights. 27?pin connector, adopts pure copper contact for good conductivity and fast connection, reliable. 3Standard European trailer connector, widely used in commercial vehicles, semi trailers, trailers. 4Aluminum alloy socket, anti?oxidation and anti?corrosion, durable and sturdy. 5Simple installation, comes with the 7?way connector, mounting bracket and necessary accessory.1 x 7-Pin Connector Socket 6 x Blue Buckle 4 x Cable Tie