20 x 20 x 4 (3 3/4") Furnace Filters
3M Filtrete 20 x 20 x 4. Case of 4
- Genuine Original 3M Filtrete 20 x 20 x 4
- Actual Size 19 1/2" x 19 1/2" x 3 5/8"
- Equivalent to MERV 11
- Case of 4
Sold Out
Aerostar 20x20x4 MERV 13 Pleated Filter - Actual Size : 19-1/2 x 19-1/2 x 3-3/4 Inches - Case of 4
- Standard 20 x 20 x 4 Pleated Filters
- Actual/Exact Size : 19 1/2" x 24 1/2" x 3 3/4"
- MERV 13 Rated
- Manufactured in Canada by Filtration Group
- Case of 4