20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 10 Air Filters 1 Pack AIR FILTER BOXES Meters can be recalibrated

Meters can be recalibrated

meaning it has three times the amount in each pellet as Sluggo (1% iron phosphate)

An engineered hydrophilic foam cutting propagation medium specifically designed for optimal callus and rapid root development

store and sell with only one cut at harvest

Chlor a’ Clean helps sustain a rich growing environment for plants by neutralizing the buildup of Chloramine and Chlorine

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 10 Air Filters 1 Pack AIR FILTER BOXES Meters can be recalibratedImportant 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,