If you're going for somethign at or close-to the 120" max width, I would NOT recommend this product!  There are three pieces to it.  The middle section of the rod is the thinnest and it goes inside the 2nd and 3rd portion that end up at the ENDS of the total curtain rod.  There isn't anything that keeps the middle rod SNUG and in-place between the two outer rods.  If you're intending to pull the curtains open and closed, I could easily see this being an issue.