The floating structure of woven V-shape continuous mobius movement design between bristle nylon brush and rubber brush correlated, consequent rolling rotational torque allow full immersive cleaning across all floor surface contact in agitate dirt, hair, fur, etc to be vacuumed into the robot, without incurring damage (scratched floor). High-quality Main Brushes for XIAOMI Roborock Robot Vacuum Cleaner. Floating structure, deep cleaning. Nylon brush, it will not scratch the floor. Detachable design, easy to clean. Crafted with superior ABS, solid and quite durable in use. Replace at regular intervals for more efficient cleaning (Recommend to replace every 6~12 months) Accessories in reference to S5 Max model: