7 to 6
the make and adaptor,,,,,,,, cheap and easy,,,,, the only thing is once you connect the trailer with the adpator,,,,, the brakes make lock up,,,,,,,,,, if they do,,,,,,, simply take the adaptor apart,,,,, (simple,,, just one screw) and switch the brake feed wire so that is matches up with the center conector on the truck (i am pretty sure it's the center wire,,,,,,,, it's been acouple years since i had to do it my self),,,,,,,,,,, cheap, easy,,,,,,,,,, no head ache