20x25x5 (4 3/8) Lennox X6673_X6675 Replacement  MERV 8 Pleated Plus Carbon 4 Pack Fertilizer The fungal spores attack the

The fungal spores attack the host insect through its cuticle

Twister T4 Rails enable quick and convenient angle adjustments

• Complete one-bag nutrient solution: Balanced nutrient proportion promotes robust growth

Nordic Pure 20x25x5 Air Bear Replacement MERV 8 Carbon air filters measure an actual depth of 4 7/8"

Extremely Fast

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement  MERV 8 Pleated Plus Carbon 4 Pack Fertilizer The fungal spores attack theImportant 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,