Housmile 500/600 Series Blueair Classic Air Purifier Replacement Smokestop Filter Fit Blueair 650E, 605, 603, 601, 555EB, 550E, 510, 505, 503, 501 Carbon pre-Filter Added Compared to Genuine Filter

I liked the fact that these filters feel heavy duty. i replaced the existing filters with these and they fit great and are working just fine.

They fit fine but since we just installed them, it may take some time to determine if they work as well. We’re hoping they do since they are much more reasonably priced than the Blueair filters.

Need clean air in house, will buy again .Just hope the filters drop in price as i am 70 an they are costly . thank you

These are not perfect--the air circulation through them is not as easy as the original Smokestop filters. But they do seem to filter and freshen the air well overall. Since we can't get the originals from BluAir anymore, and that company seems intent on price gouging us for the filters they do offer, we're pleased enough with these.