20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 14 Air Filters 4 Pack complete grow kit Leak free design

Leak free design

Sycamore and many more

square wave technology provides much greater current stability and consistency in output levels

Cabbage Butterfly (Pieris rapae)

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 14 Air Filters 4 Pack complete grow kit Leak free designImportant 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,