12x24x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 1 Pack ac-dehumidification-humidification DL Light Proof Ducting is

DL Light Proof Ducting is available in 4"

and works well in hydroponics

Pallet of 30 Cases (6/Case)

Hydrofarm has made it easy to start a tent grow by gathering several vital components into one package

12x24x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 1 Pack ac-dehumidification-humidification DL Light Proof Ducting isNordic Pure 12x24x4 MERV 7 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that will attract and capture most airborne particulates in your home. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon material while