FilterBuy 16x20x4 MERV 11 Pleated AC Furnace Air Filter, (Pack of 4 Filters), 16x20x4 &ndash; Gold 16x20x4 MERV 11 Pleated Air Filter for AC HVAC or Furnace (Pack of 4 Filters). AFB Gold MERV 11, comparable with MPR 1200 Allergen or Micro Particle MPR800. MERV 11 SYNTHETIC MEDIA DESIGNED FOR ALLERGEN PROTECTION: Attracts and captures pet dander, lint, dust, pollen, dust mite debris, mold spores, smoke, and smog. LONG-LASTING: Designed to last up to 3 months. Suitable for residential and business or commercial use (Industrial grade). MADE IN THE USA: Manufactured by FilterBuy in the USA using 100% American made components. Save big on a premium product by purchasing directly from the manufacturer. HIGH QUALITY: Filter frames are made of beverage board, which stays strong through humidity and temperatures up to 200 F. Synthetic media provides significantly higher particulate efficiency than standard cotton media.