As part of normal maintenance, it can be easily removed and replaced It is recommended that you replace spare parts every 2 to 3 months depending on the frequency of use to keep the machine running at its best performance Helps clean the vacuum cleaner and makes your lifestyle healthier It can remove 99.9% fine dust particles, protect the air in your living environment and the service life of the vacuum cleaner Easy to install and remove, no need to spend extra energy and time. Filter name: humidification filter Filter efficacy: remove impurities in the water, calcium and magnesium ions, purify water quality, etc. Replacement cycle: 6-12 months Applicable models: For air purifier -2801FZ Colour:blue Material:plastic Package Contents: 2 x Air Purifier 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.