20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 15 Plus Carbon 2 Pack Extension Optimal ratios of nitrogen and

Optimal ratios of nitrogen and phosphorus promote increased root development

When selecting the best equipment for your greenhouse

Twister T4 Lever (Control Box) - Black

soil-borne pests

The special blend of rooting hormones and naturally occurring ingredients in LIFE Cloning Gel creates healthy plants from the roots up

20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 15 Plus Carbon 2 Pack Extension Optimal ratios of nitrogen andImportant 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,