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18x18x1 Filtrete 1900 MERV 12 Ultimate Allergen Reduction | Air Filters, Inc.
3M Filtrete 18x18x1 MERV 11 Pleated Air Filter Pack of 2 New & Sealed | eBay
Amazon.com: Filtrete 18x18x1 Air Filter, MPR 1500, MERV 12, Healthy Living Ultra-Allergen 3-Month Pleated 1-Inch Air Filters, 6 Filters : Everything Else
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Filtrete 18-in W x 18-in L x 1-in MERV 13 1900 MPR Premium Allergen, Bacteria and Virus Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com
