Aerostar 16 3/8 x 21 1/2 x 1 MERV 11 Pleated Air retailer Filter, AC Furnace 6pack

Product Name: Aerostar 16 3/8 x 21 1/2 x 1 MERV 11 Pleated Air retailer Filter, AC Furnace 6pack
Nominal size: 16 3/8x21 1/2x1; Actual size: 16 3/8"x21 1/2"x3/4"; This MERV 11 filter is comparable with MPR 1000-1200 & FPR 7. Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, and smoke Simple to install and a cost-effective step towards a healthier home environment. For best results, change your filters every 60 to 90 days but increase frequency to 30 days during peak summer and winter months 100% synthetic electrostatic media for high efficiency with retailer low air flow resistance Manufactured by Filtration Group, a world-leading manufacturer and supplier of filtration solutions making the world safer, healthier & more productive.