22x24x1 MERV 14 AC Furnace Filters 6 Pack Hand Tools These growing blocks are used

These growing blocks are used for direct sowing or "blocking on" of Macro and Multiblock raised plants

#3 Perlite (1/8" - 5/8" granules)

but due to the 2

98umol@AC277V

22x24x1 MERV 14 AC Furnace Filters 6 Pack Hand Tools These growing blocks are usedNordic 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.