The replacement parts are compatible with the robot vacuum cleaner s9 (9150) s9+ s9 plus (9550) High-efficiency and high-quality rubber roller brush, environmentally friendly material, durable, delicate and soft, effectively helps the robot vacuum cleaner clean the floor Replace the filter every 2-3 months to maintain the cleaning performance of the vacuum cleaner while reducing dust infiltration Easy to install: It is easy for you to install the vacuum cleaner brush kit without complex steps Color: as shown Material: plastic + rubber Package Contents: 6 x Main Brush 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.