11 1/4x19 1/4x1 Exact MERV 13 AC Furnace Filters 12 Pack Environmental Controllers Removable grid keeps larger birds

Removable grid keeps larger birds from throwing seed on the ground

Independent illumination reduces interference from ambient light sources

The stakes are bagged up—also 100 per pack

*Tested & Verified by AHAM - Testing standard of 24 hrs at 80°F

Air Velocity: Max 25 mm/sec (4900 ft/min)

11 1/4x19 1/4x1 Exact MERV 13 AC Furnace Filters 12 Pack Environmental Controllers Removable grid keeps larger birdsNordic 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