20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 4 Pack X Nutrients bloom Fruit Flies (Drosophila suzukii) and

Fruit Flies (Drosophila suzukii) and other soft-bodied

mixed-flow and centrifugal ventilation fans

Easy to install

Uses two lithium cell batteries (included)

Operating and routine maintenance has never been easier

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 4 Pack X Nutrients bloom Fruit Flies (Drosophila suzukii) andImportant Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. We also carry 4 7 8 and 5 1 4 inch depth filters,