[Cleaning and Replacement]The Pre-filter can be removed for cleaning separately. You can use a brush to gently wipe the dust on it. Ensure the best performance of the vital 100 filter, it is recommended to replace it every 3-5 months. Our vital 100 air filter can provide the same filtering effect as the competition, while consuming less energy and enjoying life easily HEPA H13 FILTRATION: Trusted to remove 99.9% of harmful particles including allergens, odors, VOCs, smoke, pollen, pet dander, dust, smog, contaminants, and more down to 0.1 Micrometres in size. Captures finer particles than HEPA H11 (0.3 Micrometres). [Cleaning and Replacement]The Pre-filter can be removed for cleaning separately. You can use a brush to gently wipe the dust on it. Ensure the best performance of the vital 100 filter, it is recommended to replace it every 3-5 months. Our vital 100 air filter can provide the same filtering effect as the competition, while consuming less energy and enjoying life easily Part # Vital-100-RF. Our air purifier filter size has been rigorously tested many times,fully compatible with lev.oit vital 100 air purifier. The perfect product for you to improve your quality of life and get a better breathing experience [3 Stage Filtration] Our vital 100 replacement filter has 3-stage filtration system(Washable and removable pre-filter High-efficiency activated carbon filter H13 true HEPA filter)Three layers of filtration more thoroughly remove dust particles of all sizes and unpleasant household odors Colour:black+white Material:plastic Package Contents: 4 x HEPA Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.