Fits on my low profile k70 rapidfire. I'll be only using it to protect my keyboard from dust rather than typing with it on.
I had in mind that the cover would help make the keyboard a tiny bit quieter (although yes, I know it is a mechanical keyboard), but I'm happy with just having it covered and protected. However, it seems that there are two buttons where the big enter button on my keyboard is and the cover sits a bit funky on it, but it's fine. Just a heads-up for that.