20x25x5 (4 3/8) Lennox X6673_X6675 Replacement  MERV 10 Pleated Plus Carbon 1 Pack spl_allstate pH+ is designed specifically to

pH+ is designed specifically to increase the pH level during both the Grow and Bloom phase

Ideal for Veg and Bloom

Biofuel™ SP is an innovative new fertilizer technology that powers plant growth with beneficial biology

Use in the field

allowing for frequent

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement  MERV 10 Pleated Plus Carbon 1 Pack spl_allstate pH+ is designed specifically toImportant 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,