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Item Model Number: AAS-21x21x4.5
Brand: AAS American Filters Filter size: 21x21x4.5 Actual Size: 20.75 x 20.75 x 4.38 Whole House Filter MERV 13 High Efficiency Air Filter (similar performance to MPR 1500/1900 and FPR 10): Offers optimal protection against dust, pollen, pet dander, mold, smog, bacteria, and virus-carriers, trapping up to 98% of airborne particles without affecting air flow. Residential / Commercial Use Made in the USA Ships in 48 hours
