They are not only good for cleaning pipes, I don't smoke but I do a lot of other things with them. I needed something that would clean between the metal washers on the tool, all kinds of nozzles that get clogged with sprayers, and those places even an old toothbrush wouldn't reach, like under plumbing fixtures. I've used them for cake decorating tips and to get into places in my sewing machines that the brushes can't reach. They are great to have at home.
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