23.5x23.5x4 MERV 13 Pleated Air Filter for AC HVAC or Furnace (Pack of 4 Filters). AFB Platinum MERV 13, comparable with MPR 1500 to 1900 (Ultimate Allergen Defense) or Allergen Elite FPR 10. | HOSPITAL GRADE MERV 13 SYNTHETIC MEDIA: Attracts and captures airborne particles or allergens less than one micron in size such as pollen, fine dust, pet dander. Also captures bacteria, viruses carrying particles, mold spores and smoke. | 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. | 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.

ZEROWATER REPLACEMENT FILTERS: Ensure you are drinking pure-tasting, cleaner water by replacing your ZeroWater pitcher filters regularly. Our replacement filters fit in all ZeroWater pitchers and water dispensers, from the smallest pitcher to the largest. | FIVE STAGE WATER FILTRATION: Unlike many water filters & pitchers, ZeroWater filters use 5 stages of filtration, to bring you cleaner, better tasting water. Instead of carbon filtering only, our filters use Ion Exchange Technology to reduce contaminants. | NOT AN ORDINARY WATER FILTER: ZeroWater filters filter water in 5 stages, are NSF certified to reduce lead and other heavy metals. Zerowater removes 99.6% of total dissolved solids, 2X more than the leading brand (tested by independent lab). | GET MORE OUT OF YOUR WATER: Remove more impurities from your water with ZeroWater's unique, 5 stage filter system. With a variety of options, you can have cleaner water anywhere, from pitchers, bottle filtration systems, or portable on-the-go cup filters. | GET THE LEAD OUT: ZeroWater filters are the only pour-through filters NSF Certified to remove chromium & lead. Our pitchers, tumblers, & dispensers remove virtually all solids for the purest tasting water.