https://www.ebay.com/sch/i.html?_nkw=Aftermarket+Blueair+500+600+Carbon+Series+Replacement+Filter+3+Pack+&_sacat=0&_dmd=2

Aftermarket Blueair 500/600 Carbon Series Replacement Filter (3 Pack)

Regular price
$124.00
Sale price
$78.00

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