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iRobot Roomba 4100 Repair - iFixit
Amazon.com - Replacement for iRobot Roomba 4100 Battery, Side Brush and Filters - Kit Includes 1 Battery, 5 Side Brushes and 5 Filters - Household Robotic Vacuums
Amazon.com - Replacement for iRobot Roomba 4100 Battery, Side Brush and Filters - Kit Includes 1 Battery, 5 Side Brushes and 5 Filters - Household Robotic Vacuums