20x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 2 Pack commercial-lighting-fixtures Sleeves are designed with tunnelized

Sleeves are designed with tunnelized elastic to offer a more secure closure

should be used with a 16" bowl trimmer

Ionic PK Boost allows the grower easy control of the extra phosphorus and potassium that can lead to bumper yields

Four side windows with zipper

laying eggs as they feed

20x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 2 Pack commercial-lighting-fixtures Sleeves are designed with tunnelizedImportant 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