SpiroPure 9x20x4 MERV 13 Pleated Filter Air Filters - Made in USA (6 Pack)

9x20x4 ACTUAL: The actual size of this replacement filter is 9x20x3.75 MERV 13 RATING: With an efficiency of 90% or better; these filters are a great choice for inpatient hospitals and other commercial environments that require increased contaminant reduction. FILTERS ALLERGENS: Removes potential allergens such as dust; lint; dust mite debris; pollen; mold spores; pet dander; auto emissions; smoke; and bacteria QUALITY REPLACEMENT: Comparable to a 3M Filtrete MPR rating of 1500-1900 (Healthy Living models) MADE IN USA: Our pleated furnace filters are Made in the USA and offer a high quality replacement air filter option for your air conditioner and/or furnace unit without the high cost.