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20x25x4 ReservePro Part # GA100A1037 MERV 10 - Replacement of Honeywell FC100A1037 & Lennox X6673 Size 19 7/8" x 24 3/4" x 4 3/8" Case of 5

20x25x4 ReservePro Part # GA100A1037 MERV 10 - Replacement of Honeywell FC100A1037 & Lennox X6673 Size 19 7/8

20x25x4 ReservePro Part # GA100A1037 MERV 10 - Replacement of Honeywell FC100A1037 & Lennox X6673 Size 19 7/8" x 24 3/4" x 4 3/8" Case of 5. Features : Replacement of Honeywell FC100A1037 Size 19 7/8" x 24 3/4" x 4 3/8". Also replaces Lennox Part X6673 Actual Size 19 3/4" x 24 3/4" x 4 3/8". MERV 10 synthetic media designed to attract and captures pet dander, lint, dust, pollen, dust mite debris, mold spores, smoke, and smog.