[Cleaning and Replacement]The Pre-filter can be removed for cleaning separately. You can use a brush to gently wipe the dust on it. 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. 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 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: 2 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.