![Filter King 17x21x1 Air Filter (4-PACK) MERV 8 HVAC Pleated AC Furnace Filters Actual Size: 17 x 21 x .75 MADE IN USA 17x21x1 Inch (Pack of 4) - Walmart.com Filter King 17x21x1 Air Filter (4-PACK) MERV 8 HVAC Pleated AC Furnace Filters Actual Size: 17 x 21 x .75 MADE IN USA 17x21x1 Inch (Pack of 4) - Walmart.com](https://i5.walmartimages.com/seo/Filter-King-17x21x1-Air-Filter-4-PACK-MERV-8-HVAC-Pleated-AC-Furnace-Filters-Actual-Size-17-x-21-x-75-MADE-IN-USA-17x21x1-Inch-Pack-of-4_d1a738f8-b601-475a-8946-7ddaecc1cc47.123cb7d04c5198b6a73c2f393a8a3608.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
Filter King 17x21x1 Air Filter (4-PACK) MERV 8 HVAC Pleated AC Furnace Filters Actual Size: 17 x 21 x .75 MADE IN USA 17x21x1 Inch (Pack of 4) - Walmart.com
![HDX 21 in. x 21 in. x 1 in. Elite Allergen Pleated Air Filter FPR 12, MERV 13 61201.012121 - The Home Depot HDX 21 in. x 21 in. x 1 in. Elite Allergen Pleated Air Filter FPR 12, MERV 13 61201.012121 - The Home Depot](https://images.thdstatic.com/productImages/f891bb89-5e27-4a22-b7aa-c759949593f0/svn/hdx-air-filters-61201-012121-64_600.jpg)
HDX 21 in. x 21 in. x 1 in. Elite Allergen Pleated Air Filter FPR 12, MERV 13 61201.012121 - The Home Depot
![Amazon.com: Pamlico Air 21x21x1 MERV 8 Pleated HVAC AC Furnace Air Filters. 6 Pack. (Exact Size: 20.5 x 20.5 x 0.75 Inches) : Tools & Home Improvement Amazon.com: Pamlico Air 21x21x1 MERV 8 Pleated HVAC AC Furnace Air Filters. 6 Pack. (Exact Size: 20.5 x 20.5 x 0.75 Inches) : Tools & Home Improvement](https://m.media-amazon.com/images/I/5155GVmLQaL._AC_UF894,1000_QL80_.jpg)