20x25x4 (3 5/8) Pleated MERV 7 Air Filters 6 Pack Aeromixer This aggressive formula contains proprietary

This aggressive formula contains proprietary blends of calcium and balanced levels of magnesium to ensure that plants thrive

Adds size and weight to flowering plants

Double-sided tape around wrists helps keeps gloves in place during donning

This product is made in the USA

There is nothing remotely like it for safety and effectiveness available on the market today

20x25x4 (3 5/8) Pleated MERV 7 Air Filters 6 Pack Aeromixer This aggressive formula contains proprietaryImportant 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 20x25x4 filter