iRobot Roomba S Series debris extractors are only compatible with S Series vacuum cleaners. They are delivered in packs of 2 extractors. These rubber brushes are flexible and in continuous contact with your floors. They are therefore essential to ensure the constant performance of your Roomba S-series vacuum cleaner, whether on hard floors or carpet.
These two debris extractors each play a different role: the first brush removes the dirt by a friction mechanism while the second rotates in the opposite direction to send the dirt to the Roomba's suction system.