20x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 2 Pack nutrient-combo • The Neutralizer Essential Oil

• The Neutralizer Essential Oil cartridge - 100 ml (x1)

A ventilation ducting tool designed to fit different-sized duct hole openings together

Want to switch from rockwool to coco without altering their grow workflow

Carrot Weevil

this key element is often missing and keeps plants from reaching their full genetic potential and optimal health condition

20x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 2 Pack nutrient-combo • The Neutralizer Essential OilImportant 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