I think it is an old lincoln model that uses a 7 1/2" bottle. It's big and so big that I think I can put a small plasma cutter with it and still room for more stuff. Two levels - 24"x36" and nothing else so I'm looking for odds and ends to weld to it before I begin using it on "STUFF". So I'm looking for your "great ideas" on your cart that I can use for mine. I was think of a tray to add, hooks for the trigger cables and maybe a grinder holder.