Good quality material: The body of them is made of ABS and thermoplastic elastomer. The bristles are made of soft and durable nylon and will not damage your floor. The main brush has dense bristles, no knocking noise and does not scratch the floor, which is quick to snap on and can be easily replaced. Efficient cleaning: The V-shaped main brush rotates at a high speed of 1350 revolutions per minute and effectively pushes the dust in the joints of the floor tiles and the edges of the carpet into the dust bin, which shines with strong cleaning power. The mop is highly decontaminated and the cleaning rate is up to 99%. Removable and easy to clean: Both ends of the detachable roller brush can be removed and easily cleaned. The replacement parts are easy to install and save you a lot of time. The design of the robot sweeper's roller brushes can effectively clean different types of floors, including hardwood floors, ceramic tiles, carpets, etc. Recommendations: We recommend replacing the