Like the last reviewer, I was hoping to have a frame attached, too. Maybe because my model is 7100-A, it's different? I have a clip on each side of the unit, which allows the filter to stay put, but loosely. May have to glue it in, too, to have a firmer fit. Texture of the pre filter different, but no problem. I give it four stars, because I'm at least glad to have something. Thank you, Water Marque.