The only reason I did not use a five is because I have not put them in yet. But extremely happy I did not have to go out to buy them. Glad I am on automatic ordering.
While it took longer to arrive than anticipated, and I was surprised to see that some of the filters were white while others had a gray tint to the filter element - which could be confusing if you didnt write the install date on the filter you were replacing - it does the job.