11 1/4x11 1/4x1 Exact MERV 7 AC Furnace Filters Number Per Box:12 There is a metal mesh

There is a metal mesh support grid bonded to the pleats for extra support

or for industrial customers who may need a pre-filter to help with strong smells

a human hair is about 70 microns wide

clean smell

RETURNS: Custom Carbon AC furnace air filters are not returnable since we hand make them per your exact dimensions when you enter your air filter size above

11 1/4x11 1/4x1 Exact MERV 7 AC Furnace Filters Number Per Box:12 There is a metal meshActual Size: 11 1 4 x 11 1 4 x 3 4 (11. 25 x 11. 25 x 0. 75) Merv 7 pleated air filter captures large airborne particles like household dust, mold spores, and pollen. This dust reduction air filter is ideal in keeping your AC and furnace equipment working efficiently Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 7 is equivalent to MPR 600 Made in the USA. Nordic Pure MERV 7 Pleated AC Furnace