6pcs Side Brush 3-armed for iRobot Roomba 500 600 700 Vacuum Cleaners 510 530 532 550 560 620 625 760 770 780 side brush 3 armed screw for irobot roomba 500 510 530 532 535 540 550 560 562 570 580 600 610 625 700 760 780