Photo 1 of 311i Max Replacement Filter Compatible with Blueair Blue Pure 311i Max Air Puri-fi-ers, H13 True HEPA & Activated Carbon Filter, Compare to Part #F3MAX, 2 Pack

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Photo 1 of 311i Max Replacement Filter Compatible with Blueair Blue Pure 311i Max Air Puri-fi-ers, H13 True HEPA & Activated Carbon Filter, Compare to Part #F3MAX, 2 PackPhoto 2 of 311i Max Replacement Filter Compatible with Blueair Blue Pure 311i Max Air Puri-fi-ers, H13 True HEPA & Activated Carbon Filter, Compare to Part #F3MAX, 2 Pack