8x24x1 Exact MERV 7 AC Furnace Filters 12 Pack Cone Filler Great for short lengths of

Great for short lengths of tubing that point directly down to plant sites

Feed pressure - line burst detection

Mini-Blocks sit in a tray (flat) without support for easy starting of seeds and cuttings

or individually

there is no need to change the screen when switching over from a DRY run to a WET run

8x24x1 Exact MERV 7 AC Furnace Filters 12 Pack Cone Filler Great for short lengths ofNordic 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