Purifier filter element: It is composed of multi-layer materials such as pre-filter layer, high-efficiency filter layer, activated carbon layer, etc., each performing its own duties, enhancing the adsorption force of tiny particles, further improving the filtration performance, and comprehensively purifying the air. Active Carbon Filter: It can intercept hair, large particles, etc., prolong the service life of the main filter layer, and at the same time is easy to clean, so that the air is fresh and natural, and you continue to provide clean air. HEPA filter: simple and convenient installation, tight fit, core filter layer, to ensure that the filtration effect is not affected. Replacement filter element: good structural design and material selection, extremely low noise during operation, while ensuring efficient filtration, low resistance to air flow, does not affect the air output of the purifier, and does not interfere with your work, study and rest. hepa filter ，Compatible For Sharp，Replacement HEPA and Deodorizing Filter for Air Purifier UA-HD50E-L UA-HD50U-L UA-HD40E-L UA-HD40E-T UA-HD40U-L