20x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack LED Lighting • OMRI listed for organic

• OMRI listed for organic gardening

The Dual-Purpose Hybrid tumbler has been extensively tested and found to trim wet product better than our old 1/8” Wet Tumbler and dry product better than our old 1/4″ Dry Tumbler

and dust from various spaces

Molds and Mildews

• Free Bluelab Connect Software available online

20x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack LED Lighting • OMRI listed for organicImportant 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. If you are replacing a 4 3 8 depth 20x20x4 filter