Duel axel/3500#/ 12" drum/ wheel cylinders. having to replace these suckers and the zerks are frozen and the brass brake line fittings are frozen! arghhhh. Now i have to replace the 18" flexible plastic brake lines ( 2 male brass threaded fittings) what size are the fittings and size of the line? Standard wheel cylinder. I want to make sure i order the right ones. thanks