20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack Nutriants Fill solution for double junction

Fill solution for double junction pH & ORP electrodes

000W DE MH Lamps were designed with the grower’s garden in mind

NOP compliant insecticide at any point throughout your growing season and up to the day of harvest

not included in this case)

For use in hydroponic

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack Nutriants Fill solution for double junctionImportant 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,