Nordic Pure 28x30x4 (3 5/8) Pleated MERV 12 Air Filter 1 Pack

Nominal Size: 28 x 30 x 4, Actual Size: 27 3/8 x 29 3/8 x 3 5/8 (27.38 x 29.38 x 3.63) Measure your current filter and compare the exact dimensions with the Actual Size listed above before you order. 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 Ideal for high efficiency air filtration and will help those with moderate allergies and asthma.