16x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 8 Air Filters 2 Pack lighting-&-electrical-components Micron Sizes:

Micron Sizes:

Roots organics super phos bat guano is fast acting and so powerful it should  be used carefully and sparingly

a dip or a root drench

Air root pruning is a key component to a healthy fibrous root ball

and many more home applications

16x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 8 Air Filters 2 Pack lighting-&-electrical-components Micron Sizes:Important 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,