20x25x5 (4 3/8) Lennox X6673_X6675 Replacement  MERV 8 Pleated Plus Carbon 1 Pack Emitters and humic acids to help

and humic acids to help ensure you have a thriving

Max WATTS: 2000

It's a non-selective weed killer that uses d-limonene (a natural citrus oil) as its active ingredient and is effective against a broad spectrum of weeds and grasses

Anyway you use it

the other for Calibration

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement  MERV 8 Pleated Plus Carbon 1 Pack Emitters and humic acids to helpImportant 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,