Filter Height: 8.27in (21cm), Width: 7.87in (20cm). Note: Do not fit for 311 Auto,411,411i Max, 211i Max, 311i Max, 311i+Max. ONLY compatible for Blueair Blue Pure 511.
Blue Pure 511 Replacement Filter for Blue Air Pure 511 Air Purifier True HEPA...
Blue Pure 511 Replacement Filter for Blue air Pure 511 Air Purifier True HEPA &
2-Pack 511 Replacement , Compatible with Air Pure 511 , True H13 HEPA4066
