16x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 10 Air Filters 2 Pack discounted 025 microns) and bacteria (gram-positive

025 microns) and bacteria (gram-positive and gram-negative)

It is designed for Hydro-X Pro system only

GENERAL INFORMATION: Aphytis melinus has been used for scale control since 1956 when it was imported from India and Pakistan

Pediococcus damnosus

16x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 10 Air Filters 2 Pack discounted 025 microns) and bacteria (gram-positiveImportant 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,