- 1.1 Pack Triple Filtration - H13 HEPA + Activated Carbon 2-in-1 Filter (2 pieces) - Compatible with Fellowes AeraMax SV 9794501 Air Purifier; Replacement Part Number 9787901 - H13 HEPA captures up to 99.9% of PM2.5 particles as small as 0.3 microns, including dust, pet dander and other tiny particles - Activated Carbon reduces chemical VOCs, tobacco smoke, PM2.5 and common household odors - 2-in-1 design provides particle and odor filtration in one filter, with two filters per pack for ongoing use - Replacement guidance: please replace the filter regularly to keep the machine fresh and clean - Maintenance: for optimal performance, gently clean the filter once a month with a soft brush, or use a vacuum cleaner to clean - Use scenarios: ideal for bedrooms to improve sleep quality, living rooms with pets or cooking odors, and home offices needing cleaner air and odor control - Benefits: improves indoor air quality, supports safer, fresher air, and ensures easy swaps with a compatible Fellowes part number