Not sure, they are obviously made by thule, therefore fit their own, bars, and as they also do oval bars, I would assume that they fit them too.
The only thing I would say that you need to be careful with, is the width of the bar itself. I'm trying to find out what that width is on the website. Because obvioulsy if its too wide, then the stoppers won't fit on the bars
If I can't find it, I'll measure mine tomorrow and post it on here for you.
Simon