- Perfect fit for MA air purifier 14/14W/14B models. Includes 2 replacement filters. Replace every 2,500 hours or 3-4 months for best performance. - 3-in-1 filtration system: Nylon pre-filter, H13 medical-grade True HEPA filter, and activated carbon filter. - High efficiency: True HEPA captures 99.99% of particles as small as 0.01 microns; activated carbon reduces odors and gases. - Cost effective: 2-pack replacement filters with premium materials and advanced technology, ideal for homes with pets, smokers, or open-layout kitchens. - Practical applications: reduce pet dander and odors in homes with pets; remove smoke odors and gases in households with smokers; improve air quality in open-plan living areas or kitchens. - Easy replacement and compatibility: designed to replace MA 14/14W/14B filters with a straightforward swap to maintain optimal purifier performance.