not much to say here.... the reservoir is exactly as required by my mod K40. It appears to be exactly the same as the one I replaced. I do hope however, that this is easier to clean.

I took off my old one and threw it away because of calcium deposits, otherwise it worked. I was excited when I got this all shiny and new but it must not fit perfectly because it keeps leaking. Looks fine but every time I fill it up it just starts to come out the bottom where it connects and leaks all over the counter.