Generalaire 4556 / 4531 Furnace Filter 20x20x5 MERV 10 Upgraded to MERV 11 GFI 4556 for MAC Twenty. Package of 3
- Generalaire Part # GFI 4531
- 20 x 20 x 5 Media Pleated Filter
- Replacement MAC Twenty Filters
- Actual Size 20 5/8" x 19 3/4" x 4 15/16"
- MERV 11 Rated
- Also for: S1 # S1-FM10202005, Source 1 # S1-MAC202005, Trion # 255649-103, Skuttle #448-3, Skuttle DB-0020-020, Air Bear Supreme 20x20, Generalaire MAC TWENTY
- Package of 3