20x20x4 (3 5/8) Pleated MERV 13 Air Filters 6 Pack Liquid & Weight Measuring 1 x NextLight Commercial Series

1 x NextLight Commercial Series Mega Fixture

earthworm castings and Alaskan humus make up the majority of the volume within the cartridge

EZ-CLONE Clear Rez is a pH balanced

Root Wraps

20x20x4 (3 5/8) Pleated MERV 13 Air Filters 6 Pack Liquid & Weight Measuring 1 x NextLight Commercial SeriesImportant 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