16x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 8 Air Filters 1 Pack controllers It is a high PK

It is a high PK analysis product that contains protein hydrolysate to support and maintain high density bud growth

Perlite can be used as a stand-alone medium in drip systems or as a mix-in element with other growth mediums

Coir fibers promote better aeration and drainage

- Max Temp 750 F

Clear in-store EZ-CLONE system

16x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 8 Air Filters 1 Pack controllers It is a high PKImportant 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,