Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 12 Pleated Plus Carbon 2 Pack PPE It features a raised lip

It features a raised lip on the reducer end to provide extra grip on ducting or duct openings

95 PPF (photosynthetic photon flux) per watt per second light source

Accelerates & increases plant growth

organic acids

the choice is yours

Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 12 Pleated Plus Carbon 2 Pack PPE It features a raised lipImportant 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 3 8 and 5 1 4 inch depth filters,