Engineered for Mop Washing: Rotating at 500 RPM, the brush cleans the mop deeply and effectively, leaving it ready for the next cleanup. Dock Cleaning: As the brush cleans, it drives dirty water in the dock's base towards the outlet, where it can be drawn away into the dirty water tank. Detachable & Washable: As it is removable and washable, the brush can be easily maintained, keeping it effective for longer. For performance, remove and wash the brush once every two months. As part of normal maintenance, it can be easily removed and replaced The powerful cleaning function makes household cleaning more time-saving and labor-saving. It is suitable for a variety of floors such as ceramic tiles, marble, and wood floors. Applicable Model: For Roborock S8 For Roborock S8+ For Roborock S8 PLUS For Roborock S8 Pro Ultra Colour:Black-Red Material:Plastic Package Contents: 2 * Self-Cleaning Brushes Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.