Photo 1 of Aerostar MERV 13 Collapsible Replacement Filter The dimensions are 28x15x4.

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Photo 1 of Aerostar MERV 13 Collapsible Replacement Filter The dimensions are 28x15x4.Photo 2 of Aerostar MERV 13 Collapsible Replacement Filter The dimensions are 28x15x4.Photo 3 of Aerostar MERV 13 Collapsible Replacement Filter The dimensions are 28x15x4.Photo 4 of Aerostar MERV 13 Collapsible Replacement Filter The dimensions are 28x15x4.