ECOMAID B00L3V2RF6 Brush kit, Green 2 Bristle Brush & 2 Flexible Beater Brush & 2 6-armed Side Brushes Clean Brushes keep your home robot operating at peak performance New design allows your Roomba to reach deeper into the carpet for a more thorough cleaning Innovative design effectively picks up dirt, hair and debris. New design allows for easier maintenance of brushes Fits 500 series Roombas 510, 530, 535, 536, 540, 550, 551, 552, 560, 564, 570, 580, 610