18x20x2 Pleated MERV 7 Air Filters 12 Pack -monitors-&-timers Made with heavy-duty nylon

Made with heavy-duty nylon

popularly used for hydroponics

Overall dimension at Widest Setting

Helps develop strong roots

Grow1 Fresh Air Purifier is easy to maintain and has no filters to replace

18x20x2 Pleated MERV 7 Air Filters 12 Pack -monitors-&-timers Made with heavy-duty nylonNordic 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