18x24x1 (17.5 x 23.5) Accumulair Diamond 1-Inch Filter (MERV 13) (4 Pack)
This isn't one of those brands that I have to have for my filter but I have used it before and have no complaints it works just as good as the other leading brands.
Works really good for filtering the air in your home. I can really tell the difference after using this product.
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