K&N 12x24x1 Air Filter, Merv 11, Washable Air Filter, the Last Furnace Filter You Will Ever Buy, Breathe Safely at Home or in the Office (Actual Dimensions .8 x 23.6 x 11.6 inches)

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Maycold MERV 13 12x24x1 Air Filter (6-Pack), High-Efficiency Pleated AC & Furnace Filters, Actual Size: 11.70" x 23.70" x 0.75", Individually Wrapped in Plastic

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