General description High-quality main side brush set designed for models 3290, 3390, 3490, 3590, 3690, 3790, and 3890. These accessories are essential for maintaining optimal performance of your home robot, effectively reducing dust, pollen, and other allergens in the air. Technical specifications Material: Plastic Package Contents: 2 x roller brush 4 x side brush 4 x filter 6 x mop cloth 1 x cover Measurement allowed error: +/- 1-3 cm Usage To achieve the best cleaning and filtration effect, it is recommended to replace the cleaning accessories every 2-3 months based on usage frequency. The sweeping robot filter is designed to filter dust, dirt, and other impurities, ensuring the robot remains clean and operates efficiently. Other information Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product.