Exact Size: 17-1/2 x 24-1/2 x 1-3/4. Box of 4. Glasfloss ZL 18x25x2 MERV 10 Pleated AC Furnace Air Filters

For optimal performance, recommended to change at least every 3 months.. Ideal for residential, commercial, schools, office, & industrial filtration applications. Made in the USA. The engineered grading structure media supports high dust-holding capacity and long filter service life. Incorporates 100% synthetic fibers which are electrostatically charged, thermally bonded and are manufactured in an engineered gradient structure. Durable & Long Lasting: Heavy duty frame won't buckle and pleats will not allow microbial growth. Upgraded MERV 10 Filtration with similar air flow and resistance as a MERV 8 filter. Filters & captures small particles such as Lint, Dust, Pet Dander, Pollen, Dust Mites, Smog, & Mold. Comparable to MPR rating 600 to 800, or FPR 5-6 rating. Actual Measurements: 17-1/2 x 24-1/2 x 1-3/4 Inches | Nominal Size: 18x25x2 | Quantity 4 Filtration Rating: MERV 10