20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 12 Pleated Plus Carbon 1 Pack commercial-greenhouse-fixtures It is also extremely effective

It is also extremely effective in the soil (as a drench or flush) as it helps distribute water and nutrients deeper and more thoroughly while pushing out excess salts from the root zone

It offers flexibility in application by being equally effective as a foliar spray or in soil applications

The material is easy to cut to size

Can be used multiple seasons

Perfect for large garden installations

20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 12 Pleated Plus Carbon 1 Pack commercial-greenhouse-fixtures It is also extremely effectiveImportant 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,