They fit well but the sponge filter media is not as dense as the previous replacement filter I bought. I don't know how important this really is, but I do know that the denser the filter, the better it filters. Of course, a less dense filter can have more airflow, but I don't know if that's what I'm looking for in a filter. Edit: I just flushed this filter for the first time and can confirm my initial concerns; This filter media is much less dense than the previous replacement I bought. After only a few weeks of use on a small rug in our house, the dust has completely penetrated this filter. Bad sign. ... I've never seen dust fully penetrate one of these washable filters. I have just ordered one of the filters I have previously purchased. It costs about nine dollars for just one, but it's worth the extra cost. Edit 2: Just added photos. My thumb on both photos touches the filter on this list. The other filter is the one I bought earlier, and again, right now. You can see that the filters in this list are not that dense. They're cheap for a reason.