18x28x1 Exact MERV 7 AC Furnace Filters 6 Pack harvest-solutions Protects roots from damaging nematodes

Protects roots from damaging nematodes

Its unique speed control and hole design allows it to pluck the flowers from the stem without damage

Used for controlling fungus gnats

6mm inlet- 4 larger holes than 1

These propagation plugs are ideal for commercial growers

18x28x1 Exact MERV 7 AC Furnace Filters 6 Pack harvest-solutions Protects roots from damaging nematodesNordic 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