20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 13 Plus Carbon 1 Pack growing-media Increased tactile feel that allows

Increased tactile feel that allows for easier handling

Dimensions 740mm x 395mm

HO lamps: 4 included

PPFD - 1260 μmol @ 12” Vertical Distance

Directions for Use: The mycorrhizae should be placed so that new roots will come into contact with the mycorrhizal spores

20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 13 Plus Carbon 1 Pack growing-media Increased tactile feel that allowsImportant 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,