Photo 1 of (2Pack)Blue Pure 211+ Replacement Filter for Blueair Blue Pure 211+ Air Purifier and Blueair 211 Filter , Foldable True HEPA Filters, H13 True HEPA Help filter 99.97% as small as 0.3 microns

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Photo 1 of (2Pack)Blue Pure 211+ Replacement Filter for Blueair Blue Pure 211+ Air Purifier and Blueair 211 Filter , Foldable True HEPA Filters, H13 True HEPA Help filter 99.97% as small as 0.3 micronsPhoto 2 of (2Pack)Blue Pure 211+ Replacement Filter for Blueair Blue Pure 211+ Air Purifier and Blueair 211 Filter , Foldable True HEPA Filters, H13 True HEPA Help filter 99.97% as small as 0.3 micronsPhoto 3 of (2Pack)Blue Pure 211+ Replacement Filter for Blueair Blue Pure 211+ Air Purifier and Blueair 211 Filter , Foldable True HEPA Filters, H13 True HEPA Help filter 99.97% as small as 0.3 microns