All the pipes are black & 1 1/2-inch diameter.
In fact, the diameter of the pipes was partially based on the “S” hooks that I had, because you want to make sure that the hook fits over the pipe easily.
There are some detail pictures of the S hooks in the comments on this post. They are also on the main blog post. Very important: Make sure your pot rack is level when you hang it, or the pots may slide to one side. See more at: