This multi-surface rubber brush is compatible with iRobot Roomba 800 805 810 820 825 830 840 850 851 860 865 866 870 871 876 877 880 885 886 890 891 896 900 920 925 930 935 940 945 950 960 966 970 975 980 985 990 Robot Vacuum Cleaner The replacement rollers for all floors thoroughly clean even large areas and ensure sparkling clean surfaces. One brush cleaning roller moves the dirt, while the other rotates around it in the opposite direction to remove and vacuum it away. Made of high-quality rubber, the brush roller removes stains effortlessly. And the brush roller accessories can be easily removed and replaced as part of routine maintenance. Set contains: 2 light gray rubber brushes, 2 dark gray rubber brushes Tip: It's best to replace the brush every 2-5 months to keep your vacuum cleaner in optimal condition and achieve better cleaning performance.