iRobot Roomba S Series Corner-Sweeping Brush, (3-Pack)Description The Roomba s Series Corner Brush is specially designed with five arms to grab dirt and debris from deep in corners and along walls, directing it into the robots path to be vacuumed up. Compatible with Roomba s Series Robot Vacuums Only. Roomba s Series Replacement Corner Brushes. (3 Pack) The Corner Brush is specially designed at a 26 degree angle, using five 30mm brushes to clean deep into corners and along wall edges. Cleans into corners