25 Air Purifier Replacement Filter: Compatible with MA Series Air Purifier 25 S1/W1/B1, 3 in 1 Pre-filter, H13 True HEPA Filter and Activated Carbon Filter, 4 Packs

25 Replacement filter True HEPA H13 fit for 25 air purifier S1/W1/B1 models. Your unit has a filter on each side, both filters should be replaced at the same time., 3-IN-1 FILTRATION: 25 Filters are made of 3-in-1 filtration systems including Nylon Pre-Filter, H13 True HEPA Filter, and Activated Carbon Filter., HIGH-EFFICIENCY: The True HEPA filter are capable of attaching 99.99% of airborne particles as small as 0.01 microns, and the carbon filter helps you solve the problem of unpleasant odors and gases., COST EFFECTIVE: Package includes 2 Set (4 filters). Fully meet your needs for the replacement of 25 filter, with premium materials and advanced technology, ideal solution for homes with pets, smokers, open layout kitchens., CUSTOMER SERVICE: We value customer service and satisfaction. If you have any problems with the filter fitting your air purifier, please contact us through our Amazon home page.