There is a metal mesh support grid bonded to the pleats for extra support
With its two layers
the efficiency of all air filters is rated according to the same criteria as set forth by ASHRAE
the half inch (1/2") double media air filters provide exceptional air filter capacity and remarkable efficiency
Nordic Pure 16x25x5 Air Bear Replacement MERV 10 air filters measure an actual depth of 4 7/8"
15x9x1 MERV 12 Plus Carbon AC Furnace Filters All Types There is a metal meshActual Size: 15 x 8 3 4 x 3 4 (15 x 8. 75 x 0. 75) Removes lint, household dust, pollen, smoke particles, dust mites, pet dander, virus carriers, mold spores, help eliminate unwanted odors and other contaminants. Ideal for customers who not only need odor control but whose daily life demands high filtration Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 12 is equivalent to MPR 1500 1900 Made