13x18x1 Exact MERV 14 AC Furnace Filters 12 Pack Pumps & Irrigation When not in use the

When not in use the knife can be stored in the included sheath for safe keeping

Contains 2% iron

Simply sit it over a drain channel and fill it with Grodan stonewool

The Zenport ZJ68:

13x18x1 Exact MERV 14 AC Furnace Filters 12 Pack Pumps & Irrigation When not in use theNordic Pure MERV 14 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, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.