The Roborock S8 Pro Ultra G20 A6900RR main brush is a rotary turbine component designed to provide deep and uniform cleaning across various floor types, including parquet, tiles, carpets, and rugs. Constructed from a combination of ABS and rubber, this 115 mm black brush replaces traditional bristles with a specialized rubber design that significantly reduces hair wrapping and simplifies your regular maintenance. To further ease upkeep, the brush supports a reverse rotation self-cleaning system that helps release trapped hair and debris automatically. You can swap the part easily thanks to a quick-change design that requires no tools, making it a practical choice for anyone wanting to keep their vacuum performing efficiently without unnecessary effort.