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Fortify 16x25x5 MERV 11 HVAC Filters. Replacement for Lennox X6670 Healthy Climate Whole House Air Cleaner. (2-Pack)

Glasfloss ZL 13x21.5x1 MERV 10 (FPR 5-6) Pleated Air Filters. (4-Pack). Exact Size: 12-7/8 x 21-1/2 x 7/8

Glasfloss ZL 18x22x1 MERV 10 (FPR 5-6) Pleated Air Filters. (4-Pack). Exact Size: 17-3/4 x 21-3/4 x 7/8

Glasfloss ZL 21.5x23.5x1 MERV 10 (FPR 5-6) Pleated Air Filters. (4-Pack). Exact Size: 21.5 x 23.5 x 7/8