Photo 1 of 45i Replacement Filter Compatible with Alen BreatheSmart Flex Bh400 & 45i Air Purifier, 3-in-1 45i HEPA Filter+ Activated Carbon Pre Filter, B4-Pure/ Fl40, 2 Hepa+4 Carbon Filter

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Photo 1 of 45i Replacement Filter Compatible with Alen BreatheSmart Flex Bh400 & 45i Air Purifier, 3-in-1 45i HEPA Filter+ Activated Carbon Pre Filter, B4-Pure/ Fl40, 2 Hepa+4 Carbon FilterPhoto 2 of 45i Replacement Filter Compatible with Alen BreatheSmart Flex Bh400 & 45i Air Purifier, 3-in-1 45i HEPA Filter+ Activated Carbon Pre Filter, B4-Pure/ Fl40, 2 Hepa+4 Carbon Filter