Aerostar 18x18x1 MERV 11 Air Filters - 6 Count Pleated HVAC Filters for Dust, Allergens & Germs Dixie External Dimension: 20

External Dimension: 20

ECO-FRIENDLY: our high-quality Reusable K-Duo filter is made with the best and safest materials possible

shower curtain and detachable liner 3-in-1

keep bottles cold

Aerostar 18x18x1 MERV 11 Air Filters - 6 Count Pleated HVAC Filters for Dust, Allergens & Germs Dixie External Dimension: 20Nominal size: 18x18x1; Actual size: 17 3 4"x17 3 4"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%