Compatible with Roomba 800, 900, 850, 860, 861, 866, 870, 880, 890, 900, 960, 980, 981, and 985 series vacuum cleaners. Please check your Roomba model and components before ordering. These replacement parts perfectly fit your Roomba vacuum cleaner and work like the original. Made of durable and environmentally friendly materials, they are powerful enough to help the robot clean your floors faster. To maintain suction power, replace the bristle brush and beater brush every 6 months. For families with pets, the replacement cycle should be shorter.