Kit Includes: 1×Bristle Brush， 1× Flexible Beater Brush， 2× 3-Armed Side Brush， 3× Aero Vac Filters. For iRobot Roomba 600 Series (620 630 650 660) Vacuum Cleaning Robots ( the filters only compatible with AeroVac Bins) Brushes allows your Roomba to reach deeper into the carpet for a more thorough cleaning Filters maintain optimal cleaning performance. Filters reduce infiltration of dust， pollen and other allergens.