I replaced all the steel brake lines on my 1974 Ford F-250 for Nicopp including the master cylinder and proportional valve lines which have the unusually large bushings they have. The local parts stores never have a clue what I'm asking for, so I didn't look there. This kit had all the fittings I needed to replace every line on my truck without resorting to adapters or other nonsense. I didn't need 1/4" connectors, but the choice of 3/16" is worth the price.