I am very happy with these filters and pre-filters. Finally found pre-filters that are as thick as the one that came with the air purifier. The fact that they are pre-cut is great. I sent the Honeywell pre-filter replacement kit back to the store I originally bought it from because it was flimsy and had carbon particles all over it. You also have to crop them yourself. The filters seem great too, but I've only been using them for a few days. In general very satisfied.
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