I understand peoples' confusion about this filter. It works with any Keurig, but you first need to remove the plastic part that you'd use for putting in the disposable plastic K-cups. This is kind of a pain when you share a Keurig with a co-worker and need to replace parts every time. I wish it were just a reusable K-cup. At the same time, it does work well, it's very sturdy, and the coffee coming out is good.