Replacement iRobot Roomba 552 Pet Series Bristle Brush and Flexible Beater Brush, 6-Arm Side Brush - Kit Includes 3 Bristle Brush and 3 Flexible Beater Brush, 3 6-Arm Side Brush Replacement iRobot Roomba 552 Pet Series Bristle Brush and Flexible Beater Brush, 6-Arm Side 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!