20x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack spl_hlg spores erupt from the pest

spores erupt from the pest ready to infect the nearest suitable host

This not only causes problems by over feeding the root zone but also upsets the osmotic transfer of water into the roots

This bucker cuts the flowers off the stem

Patented Nitrex polymer over 6

Fan - 3600RPM

20x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack spl_hlg spores erupt from the pestImportant 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. If you are replacing a 4 3 8 depth 20x20x4 filter