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Generalaire 20x20x5 Part 4556 / 4531 Actual Size 19 5/8" x 20 5/8" x 4 15/16" With Foam Gaskets, MERV 10. Case of 3 Made in Canada by FurnaceFilters.Ca
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Generalaire 20x20x5 Part 4556/4531 Actual Size 19 5/8" x 20 5/8" x 4 15/16" With Foam Gaskets, MERV 11. Case of 3 Made In Canada by FurnaceFilters.Ca
Generalaire 4556 / 4531 Furnace Filter 20x20x5 MERV 10 Upgraded to MERV 11 GFI 4556 for MAC Twenty. Package of 3
ReservePro 20x20x5 Part 4556/4531 Actual Size 20 3/4" x 19 3/4" x 4 15/16" MERV 10. Case of 3 Generic.
York 20x20x5 Part # S1-MAC202005 or GF4531 / 4556 MacTwenty, 20x20x5 MERV 11. Package of 3
