snapmaker filter cartridge for air purifier 2 pcsHigh quality filter cartridge for optimal air quality Discover the latest innovation in air purification with our high quality filter cartridge. This specially designed cartridge ensures effective filtration and significantly improves air quality in your home or office. The filter cartridge consists of: 1 layer of G4 filter 1 layer of F9 filter 1 layer of custom activated carbon filter 2 layers of ultra dense HEPA H13 filter And offers the following