This is probably an oversight on my part but when I bought this kit I thought the fittings (straight and 90 degree) were the same as those you can buy separately. However, both types of faucets are not the same (even those you can buy separately). The ones supplied with the kit require the flexible hose to be screwed into the fitting; is not pressed in and then tightened with a plastic "dome sealing nut". I would recommend buying the pipe and fittings separately. I thought I saved money when I ended up not using any of the fittings that came with the kit. Another comment I have is the rubber washer that comes with the connectors in this kit as well as the ones you can buy separately. They all seem too soft (and pliable) to put any real pressure on them. With increasing pressure, the washers deform.