, high-quality materials, well-made, durable, and highly compatible with the equipment. clean accessories keep your home robot at peak per compatiblemance. Accessory contents are easily removed and replaced as part of routine maintenance. Also reduces the infiltration of dust, pollen and other allergens into the air you breathe. In order to achieve the best cleaning and filtering effect, cleaning accessories should be replaced every 2-3 months according to the frequency of use. 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 operate normally. The filter also prevents dust and dirt from entering the robot's motors and other parts, extending the life of the robot : Material:plastic Package Contents: 4 x side brush 4 x filter 2 x mop cloth 1 x primary 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.