16x21x1 MERV 7 AC Furnace Filters 6 Pack Trimmers 2 or 3 air filter

2 or 3 air filter frames

Great for seed starting and propagation of cuttings

serial number

Garden Beds / Soil: Apply 2–3 worms per sq

hydrate with your nutrient solution and water

16x21x1 MERV 7 AC Furnace Filters 6 Pack Trimmers 2 or 3 air filterNordic Pure MERV 7 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters