20x20x4 (3 5/8) Pleated MERV 7 Air Filters 6 Pack Environmental Controllers and to ventilate various air

and to ventilate various air circulation and exhaust projects

5 21 21 15 HGDRRDP30 Commercial Dirt Pot by RediRoot #30

6 foot power cord

Clear housing

20x20x4 (3 5/8) Pleated MERV 7 Air Filters 6 Pack Environmental Controllers and to ventilate various airImportant 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