20x20x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack trays This Mendocino line provides highly

This Mendocino line provides highly efficient performance nutrients as a standalone base nutrient or as a vegetative and bloom stimulant

The innovative V-shape design on the LED panel improves light distribution

Low Rate - 1 tsp/1 gal of water/1

All LTL Controls CO2 Generators are available in High/Low Altitude and Natural Gas/Propane options

Root is a natural rooting inoculant that combines root growth promoting bacteria

20x20x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack trays This Mendocino line provides highlyImportant 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. If you are replacing a 4 3 8 depth 20x20x4 filter