Filterbuy 18 x 18 x 1 Air Filter MERV 11, Pleated HVAC AC Furnace Filters Replacement | Wayfair
Ace 18 in. W X 24 in. H X 1 in. D Synthetic 8 MERV Pleated Air Filter 1 pk - Ace Hardware
3M FPL21-2PK-24 Filtrete Basic Flat Panel MPR100 Merv-2 Air Filter 18 By 24 By 1 Inch: 18 by 24 Inch Filters (051141387666-2)
Filtrete 18-in W x 18-in L x 1-in MERV 11 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter (2-Pack) in the Air Filters department at Lowes.com
PRO-SOURCE - Pleated Air Filter: 18 x 18 x 1″, MERV 10, 55% Efficiency, Wire-Backed Pleated - 00027441 - MSC Industrial Supply
18" X 18" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - Ceiling Recommended - HVAC Duct Cover - Flat" Stamped Face - White [Outer Dimensions: 20.5 X 19.75] - Amazon.com
18" X 24" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - HVAC Premium
American Air Filter 220-635-051 18" X 24" X 1" StrataDensity Fiberglass Air F... | eBay
Pleated Air Filters - 18 x 24 x 1", MERV 8 S-24674 - Uline