Durabasics 6 HEPA Filter Set for HPA300 Honeywell Air Purifier Filters & Honeywell HPA300 - For Honeywell Air Purifier Filter Replacement HPA300 - Replacements for Honeywell Filter R & HPA300 Filter

Fit is excellent for HPA300. Works well.

I’ve bought other filter replacements for my air purifier and they fit very loosely and would fall out when I opened it to change the filters and they just seemed cheap. This brand that I just bought fit so tightly they will not budge. They seem to be much better quality than the others I’ve bought. They felt heavier and thicker. Especially the prefilter felt much thicker than the other replacements I tried. These filters seem to be just as good quality as the original Honeywell filters that came with the purifier, I just did not want to pay the higher price for those when these seem just as good and for a good price.

much cheaper than the OEM filters AND I didnt realize it came with 4 carbon filters too. These are the stiff ones like those that came with the machine (the replacement OEM ones have been very thin). At a fraction of the price, I will now be replacing the filters much more often. They fit perfectly too

Perfect fit and much cheaper than the original replacement filters.

Yes, exact fit and works just like the Honeywell product. I have ordered this before.