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Not that I'm aware. You could try purchasing two of them and connecting them to obtain the 170 "
screws were not long enought, but I didnt think they would be , so I took longer ones with me to be sure. I was right . Needed lomger ones
Take off both end balls. The extender rod in the middle actually ends up being one of the end rods that you screw the finial into. Then slide the other rod into both end rods. We had trouble with this also.
You probably could as long as you provided an added support bracket for each rod you added, especially if you're using heavy drapes.