Photo 1 of Aerostar MERV 13 Collapsible Replacement Filter for Aprilaire 413

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Photo 1 of Aerostar MERV 13 Collapsible Replacement Filter for Aprilaire 413Photo 2 of Aerostar MERV 13 Collapsible Replacement Filter for Aprilaire 413Photo 3 of Aerostar MERV 13 Collapsible Replacement Filter for Aprilaire 413Photo 4 of Aerostar MERV 13 Collapsible Replacement Filter for Aprilaire 413Photo 5 of Aerostar MERV 13 Collapsible Replacement Filter for Aprilaire 413