1. , high-quality materials, well-made, , and highly compatible with the equipment. 2. Clean accessories keep your home robot at its best performance. Accessory contents are easy to remove and replace as part of daily maintenance. At the same time, reduce the infiltration of dust, pollen and other into the air you breathe. 3. In order to achieve the best cleaning and filtering effect, the cleaning accessories should be replaced every 2-3 months depending on the frequency of use. 4. The function of the sweeping robot filter is to filter the dust, dirt and other impurities inhaled by the sweeping robot to keep the robot clean and operating normally. The filter also prevents dust and dirt from entering the motor and other parts of the robot, thereby extending the service life of the robot. For N20 / N20 PLUS / N20 Material: plastic colour: As shown Package Contents: 1 x main brush 4 x side brush 4 x filter 4 x mop cloth 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.