I went with the 38”x84” double door kit. It came with 13’ of top rail (2 6’6” with pre drilled holes on 16” centers. When you splice the two rails together it throws the second track holes off by 1” so you have to drill new holes. I also had to modify the bottom rollers because with a 6’ opening there wasn’t enough wall left to mount them. My wife loves the look so that’s what’s important.