Photo 1 of 21x21x1 MERV 8 Air Filter (4-Pack) | Wonderfil Filters | Pleated HVAC Design | Perfect Fit for AC & Furnace Systems | Actual Size: 21" x 21" x .75"

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Photo 1 of 21x21x1 MERV 8 Air Filter (4-Pack) | Wonderfil Filters | Pleated HVAC Design | Perfect Fit for AC & Furnace Systems | Actual Size: 21" x 21" x .75"Photo 2 of 21x21x1 MERV 8 Air Filter (4-Pack) | Wonderfil Filters | Pleated HVAC Design | Perfect Fit for AC & Furnace Systems | Actual Size: 21" x 21" x .75"Photo 3 of 21x21x1 MERV 8 Air Filter (4-Pack) | Wonderfil Filters | Pleated HVAC Design | Perfect Fit for AC & Furnace Systems | Actual Size: 21" x 21" x .75"