I had to purchase this replacement Filter "Starter" Kit, due to the fact that I could not find the part alone. Although, I did find this same exact boxed set on the Keurig Site, but at a much higher price of $17.99! Best Buy never lets me down and of course had a much better price and a great deal on this item. This is the plastic filter HOLDER that sits in the Keurig 2.0 K575 water reservoir tank and it doesn't sit on tightly at all. The first one broke, very easily as I was lifting it out of the tank to change the charcoal filter pads by Keurig, which I do monthly. When it broke, the bottom part of the filter holder stayed in the tank sitting on the place it is attached to and it was super hard to get that stinker out! I actually dropped my water reservoir tank, from all the pulling, and broke a little piece off of the bottom front of the tank. This part is a very flimsy & slippery piece, moreover, you would think Keurig would come up with a better way to filter my bottled water that I always refill my water tank with anyway. I am so unhappy with the 2.0 K575 anyway, and am waiting for Keurig to come out with a much better, quality made and sturdier Coffee Maker. I understand that this is a piece that you must have in order to complete the look and maintain clean water of and in your machine, but maybe this will serve as a warning at least and also let you know where to go for the Best (Buy) price! And the only recommendation I would give to a friend is to get your replacement part for BB!