Aerostar Pleated Air Filter, MERV 13, 18x18x1, Pack of 6, Made in the USizeA

CHECK YOUR FIT - Nominal size: 18x18x1; Actual size: 17 3/4"x17 3/4"x3/4"; This MERV 13 filter is comparable with MPR 1500-1900 & FPR 10.SUPERIOR FILTRATION EFFICIENCY - Aerostar filters are made with electrostatically charged synthetic material.IMPROVE INDOOR AIR QUALITY - Protect your family and loved ones with clean indoor air quality at home. Aerostar filters are a simple to install and cost-effective step towards a healthier home environment.HIGH PERFORMING - 100% synthetic electrostatic media for high efficiency with low air flow resistance. For best results, change your filters every 60 to 90 days during normal times of year but increase frequency to 30 days during peak summer and winter months when your unit is working the hardest.MADE IN THE USA - Aerostar filters are manufactured in the USA by Filtration Group, a world-leading manufacturer and supplier of filtration solutions for residential, commercial and industrial applications.