The are made of high-strength and environmentally friendly materials to optimal performance and a healthier . HEPA filter is made of high-strength environmental-friendly materials which can block of dust down to 0.3 micrometer. The filter can maintain the cleaning performance of the sweeper while reducing the penetration of dust pollen and other allergens into the air you Replacement Filter: A dirty filter will greatly reduce suction power. Depending on the vacuuming frequency and amount of dirt cleaned for best performance change the filter at least 3 to 6 months. As part of normal maintenance it can be easily removed and replaced Helps clean the vacuum cleaner and makes your healthier Compatible with model:for Robot Vacuum-Deerma VX100 (Model Name:for Deerma ) Colour:As Shown Material:plastic Package Contents: 1 x Roller Brush 3 x hepa Filter Only the above package content other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is /- 1-3cm.