carrofix 4 flat truck to 7 way round trailer light adapter reverse plug with mounting bracket carrofix carrofix well made 4 way to 7 way flat electrical adapter is designed to save you time with a fast plug and go installation, which allows you to pull a trailer with the large round 7 way plug, even though your truck has the 4 way flat plug commonly found on many tow vehicles.<br> <br> <b>this plug consist of a female 7 way scoket that the trailer plug can plug into, and 4 way flat plug to plug into the back of your tow vehicle.</b><br> <br> <b>again,the 4 way end fits your truck side, and the 7 way end fits the trailer side.</b><br> <br> <b>package content:</b><br><br> 1x 4 to 7 way taillight electrical adapter,<br><br> 1x mounting bracket,<br><br> 6x screws, 6x nuts,<br><br> -packing in box, and instructions for use inside-<br>