Iautomatic Side Brushes for iRobot Roomba 500 600 700 Series 595 635 625 570 630 650 760 770 780 790 6 Armed - 2 Pack with 2 Free Screws Compatible with iRobot Roomba 500 Series (510, 530, 535, 540, 550, 560, 570, 580, 610) Vacuum Cleaning Robots 2 Side Brush 6 armed for Roomba 500 Series With 2 pack Free Screw