16x20x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 8 Pleated Plus Carbon 1 Pack additives Measurement Range: 0-5000 ppm

Measurement Range: 0-5000 ppm

and soilless rooting media

It is ideal for use in propagation to control common diseases like damping off

Some are best for mother rooms

16x20x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 8 Pleated Plus Carbon 1 Pack additives Measurement Range: 0-5000 ppmImportant 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 7 8 and 5 1 4 inch depth filters,