18x24x4 (3 5/8) Pleated MERV 13 Air Filters 2 Pack grow media Sleeves are designed with tunnelized

Sleeves are designed with tunnelized elastic to offer a more secure closure

Increased aeration and more drainage allow gardeners to more aggressively feed without worrying about overwatering

Heavy-duty build includes a cold-rolled steel mounting frame

and a thoughtful 4-in brush to aid in transferring pollen to its end location

Heavy Metal Removal:

18x24x4 (3 5/8) Pleated MERV 13 Air Filters 2 Pack grow media Sleeves are designed with tunnelizedNordic Pure 18x24x4 Pleated Air Filters MERV 13 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, smoke particles, smog, virus carriers, bacteria, mold spores and other contaminants are removed. All Nordic Pure pleated air filters are manufactured using a