8x8x1 Exact MERV 13 AC Furnace Filters 6 Pack Bio-Fertilizer it will continue to grow

it will continue to grow until it reaches the optimum size and then it pupates

The swivel head bolt and nylon-padded nut ensure smooth and lasting operation

Built-in thermal overload protection

This cover is comprised of plastic and closes tight around the tumbler

8x8x1 Exact MERV 13 AC Furnace Filters 6 Pack Bio-Fertilizer it will continue to growNordic Pure MERV 13 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 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200