what type of copper pipe?

[Halfbaked]

When I first came to the site as a nooobe I thought yea keg is not a good idea because you can't get in there and clean it. If it isn't clean I don't want it. I prob even said it, I gotta cut a big hole in put a 6 in tri clamp on that baby and adapt to 2 in. I couldn't wait so I cleaned best I could (car wash) ,vinager and water and sacrificial run it and then realized yea maybe I am wrong. Yea I was wrong my keg still is 2 in. Dunder and steam will clean anything. Later somewhere on a website I found a cleaning rod for a 6 gal glass fermenter that you put on a drill. I posted it cause I liked the idea. I think it was either Rad or Piss that posted back that they made one out of an arrow to clean keg . I thought DAMN I would not have freaked out on the cleaning if I had known that. I looked and can't find the thread. Anyone remember???