16x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 4 Pack reflective-and-greenhouse-films meaning you won't need to

meaning you won't need to invest in or calibrate another Oakton pen once you've become comfortable using yours

• Promotes natural development of enzymes and vitamins

nutrients or just plain water

Contains spinosad (a Group 5 insecticide) derived from the fermentation of Saccharopolyspora spinose

16x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 4 Pack reflective-and-greenhouse-films meaning you won't need toImportant 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,