20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 14 Plus Carbon 4 Pack Hydro Components GreenCure is the environmentally friendly

GreenCure is the environmentally friendly fungicide that has been proven to cure and prevent powdery mildew

Commercial Hydroponic Grower

Fortunately Mason Bees are not susceptible to the Varroa mite which has caused such havoc with honey bees all over north America

Double flute for easy control

20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 14 Plus Carbon 4 Pack Hydro Components GreenCure is the environmentally friendlyImportant 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,