mictuning 4-way flat to 7-way round blade trailer adapter wiring plug connector with mounting bracket mictuning <b>is the wiring system of the original synchronous trailer too complicated?</b><br> don't worry, the mictuning 4-way flat to 7-way round adapters customize the plug-in wiring system for you to connect the trailer! it converts the 4-pin flat socket to the 7-pin blade round socket, plug and play, and easily synchronizes the trailer's taillights and turn signal lights.<br> made of 100% copper, combined with a strong pvc casing, has excellent electrical conductivity, wear-resistance, corrosion-resistance, and is extremely durable.<br> with spring-loaded protective cover, it is dust-proof and moisture-proof, providing better protection for the adapter plug.<br> widely used in most towing vehicles, including trailers, semi-trailers, rvs, etc.<br><br> <b>package includes:</b><br> 1x trailer adapter plug<br> 1x mounting bracket<br> 6x screws<br> 6x nuts