13x21.5x1 MERV 11 Pleated Air Filter - FilterBuy.com
13x21.5x1 Air Filter – Filter Hut
Amazon.com: 13x21.5x1 Air Filter MERV 11 Rating, 12 Pack of Furnace Filters Comparable to MPR 1000, MPR 1200 & FPR 7 - Made in USA by AIRX FILTERS WICKED CLEAN AIR. : Home & Kitchen
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