20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 13 Plus Carbon 1 Pack growing-media Includes integrated low pressure and

Includes integrated low pressure and high pressure switches

where space is an issue restricting artificial light

Increased tactile feel that allows for easier handling

Pyur Scientific Acetone Pro 55 Gallon 99%

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 Includes integrated low pressure andImportant 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,