Clean brushes keep your home robot operating at peak performance. The side brush can reach deep into corners and edges to remove more dirt, dust, and grime. The filter can maintain the sweeper's cleaning performance while reducing the entry of dust, pollen, and other allergens into the air you breathe. As part of routine maintenance, it can be easily removed and replaced. It is recommended to replace it every 2-3 months or after to keep the machine at its best performance. color: photo color Material: plastic Package Contents: 2 x roller brushes 8 x side brushes 6 x rag 6 x filters 2 x cleaning tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.