21 1/2x23x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Grow1 5' Steel Stake This is a passive unit

This is a passive unit that utilizes pressure differences created by manipulating temperature to move solvent

Ideal for use with trimmers

Send wireless data up to 100m/330ft (typical indoor)*

Comes in a 500 foot roll

Provides all nutrients required for vegetative growth when combined with grow part b

21 1/2x23x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Grow1 5' Steel Stake This is a passive unitNordic Pure pleated AC air filters are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home or office. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, baking flour, mold spores and other contaminants are removed. Our filter media prevents the growth of bacteria or mold, resulting in a much healthier living space.