Replacement iRobot Roomba 563 Bristle Brush and Flexible Beater Brush - Kit Includes 1 Bristle Brush and 1 Flexible Beater Brush Replacement iRobot Roomba 563 Bristle Brush and Flexible Beater Brush The 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!