20x20x4 Furnace Filter 20 x 20 x 3.68" MERV 8 Rated Pleated Filters. Case of 4
- Standard 20 x 20 x 4 MERV 8 Rated Pleated Filters
- Actual Size 19 1/2" x 19 1/2" x 3 3/4"
- Exact Replacement for 3M Filtrete 20 x 20 x 4 Air Cleaning Filters
- Manufactured in Canada
- Case of 4