![HDX 12 in. x 18 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011218 - The Home Depot HDX 12 in. x 18 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011218 - The Home Depot](https://images.thdstatic.com/productImages/49ab6a03-eb2b-4ac6-a7f8-d5f109381dcf/svn/hdx-air-filters-hdx1p9-011218-64_600.jpg)
HDX 12 in. x 18 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011218 - The Home Depot
![American Air Filters 220-294-051 American Air Filter StrataDensity® - 12-Inch x 18-Inch x 1-Inch - Panel Filter American Air Filters 220-294-051 American Air Filter StrataDensity® - 12-Inch x 18-Inch x 1-Inch - Panel Filter](https://www.ecomfort.com/products-image/600/mass_95913_1000.jpg)
American Air Filters 220-294-051 American Air Filter StrataDensity® - 12-Inch x 18-Inch x 1-Inch - Panel Filter
![Filtrete 18-in W x 36-in L x 1-in 5 MERV Basic Pleated Air Filter in the Air Filters department at Lowes.com Filtrete 18-in W x 36-in L x 1-in 5 MERV Basic Pleated Air Filter in the Air Filters department at Lowes.com](https://mobileimages.lowes.com/productimages/02cdcb8b-1245-4656-bc20-ed59fe59401f/05222088.jpg?size=mpdhi)
Filtrete 18-in W x 36-in L x 1-in 5 MERV Basic Pleated Air Filter in the Air Filters department at Lowes.com
![12" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 14.5" x 20.5] - Amazon.com 12" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 14.5" x 20.5] - Amazon.com](https://m.media-amazon.com/images/I/811uBV8vP8L._AC_UF894,1000_QL80_.jpg)
12" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 14.5" x 20.5] - Amazon.com
![PRO-SOURCE - Pleated Air Filter: 12 x 18 x 1″, MERV 8, 35% Efficiency, Wire-Backed Pleated - 03316130 - MSC Industrial Supply PRO-SOURCE - Pleated Air Filter: 12 x 18 x 1″, MERV 8, 35% Efficiency, Wire-Backed Pleated - 03316130 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/0331613-24.jpg)
PRO-SOURCE - Pleated Air Filter: 12 x 18 x 1″, MERV 8, 35% Efficiency, Wire-Backed Pleated - 03316130 - MSC Industrial Supply
![12" X 18 Steel Return Air Filter Grille for 1" Filter - Removable Face/Door - HVAC Duct Cover - Flat Stamped Face - White [Outer Dimensions: 14.5 X 19.75] - Amazon.com 12" X 18 Steel Return Air Filter Grille for 1" Filter - Removable Face/Door - HVAC Duct Cover - Flat Stamped Face - White [Outer Dimensions: 14.5 X 19.75] - Amazon.com](https://m.media-amazon.com/images/I/51CVMEaqC-L._AC_.jpg)