Replacement iRobot Roomba 500 Series Battery, Bristle Brush and Flexible Beater Brush, 6-Arm Side Brush - Kit Includes 1 Battery, 3 Bristle Brush and 3 Flexible Beater Brush, 3 6-Arm Side Brush Replacement iRobot Roomba 500 Series Battery, Bristle Brush and Flexible Beater Brush, 6-Arm Side Brush Please check your Roomba to make sure you are purchasing the correct parts 2000mAh, 14.4V, NICD One Year Warranty On Sale for a Limited Time!