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Item Model Number: AAS-17.5x21x4.5
Brand: AAS American Filters Filter size: 17.5x21x4.5 Actual Size: 17.25 x 20.75 x 4.38 Whole House Filter MERV 8 Standard Efficiency Air Filter (similar performance to MPR 600 & FPR 5): Provides basic defense against dust, pollen, and other airborne particles, capturing up to 90% without affecting air flow. Residential / Commercial Use Made in the USA Ships in 48 hours