The filter can effectively filter fine particles such as dust in the air, significantly extending the service life of the robot vacuum cleaner. High quality materials, good workmanship, , and highly match the equipment. Cleaning accessories keep your home robot performing at its best. The accessory content can be easily removed and replaced as part of routine maintenance. It also reduces the leach of dust, pollen, and other into the air you breathe. In order to achieve the best cleaning and filtration results, cleaning accessories should be replaced every 2-3 months according to the frequency of use. Colour:As Shown Material:sponge Package Contents: 10 x filter sponge 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.