Nordic Pure 20x24x4 (3 5/8) Pleated MERV 15 Air Filter 1 Pack

Nominal Size: 20 x 24 x 4, Actual Size: 19 3/8 x 23 3/8 x 3 5/8 (19.38 x 23.38 x 3.63) Measure your air filter for the exact size and compare it to our actual size to ensure proper fit. Made with MERV rated synthetic poly blend pleated media Nordic Pure recommends changing 4" air filters every 3-6 months Made in the USA: Proudly manufactured in the USA, ensuring quality and supporting local production Maximum filtration for superior air quality, designed for hospitals, laboratories, and high-purity air needs.