These Generic air filters are the perfect low cost alternative if youre looking for quality, high grade filters built in the USA without paying a high price. With a MERV 13 electrostatic media, these filters are comparable to any MERV 13 filter out there including Accumulair Diamond, DuPont ProClear, and Filtrete 1500 Ultimate Allergen Reduction filters. Each filter will last up to 90 days under normal conditions. Available in over 40 standard sizes, theres sure to be a one here that fits your needs! Made in USA. Actual Size: 17.5 x 17.5 x .75

• Nominal Size 18x18x1. Actual Size 17.75 x 17.75
• MERV 13 Rated. Electrostatically charged. Great for reducing air borne allergens such as , mildew, pet dander and particles that carry viruses.
• Pack of 6 Filters.
• Each filter lasts up to 3 months under normal use.