4 Pack MA 25 Replacement Filter for MA-25 Air Purifier S1/W1/B1, 3-in-1 High-Efficiency Filtration System, H13 True HEPA Filter and Activated Carbon Filter

["Compatible Model: Our 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. Please check your air purifier model number before placing your order.","3-IN-1 Filtration: 25 replacement filters are made of 3-in-1 filtration systems including nylon pre-filter, H13 True HEPA filter, and activated carbon filter. The activated carbon filter can effectively adsorb household odors from pets, cooking, smoking, and VOCs.","True HEPA H13 Filtration: Premium quality, the H13 HEPA with even spacing, abundant pleats to reduce wind resistance, and rapid air circulation. The H13 true HEPA filter can capture 99.7% of suspended solids as small as 0.3 microns. Providing you and your family with a comfortable environment.","Valuable Packages: Package includes 2 Set filters(4 pack 25 replacement filters). Recommended to replace filters every 3-4 month. MA 25 replacement filter is the ideal solution for people with pets, smokers, open kitchens. Providing you and your family with a comfortable environment.","After-sales Service: If you have any questions about our 25 replacement filter, please contact us. We will give you a satisfactory reply within 12 hours, always putting customer experience as our top priority, you can buy with confidence."]