Replacement 3-Pack iRobot Roomba 585 Bristle Brush - Replacement for iRobot Roomba Robotic Vacuum Parts Replacement iRobot Roomba 585 Bristle Brush Brushes allows your Roomba to reach deeper into the carpet for a more thorough cleaning Replace brushes every 2 to 3 months for best performance Please check your Roomba to make sure you are purchasing the correct parts On Sale for a Limited Time!