Dispatched from and sold by TOPRATE Compatible with: iRobot Roomba 700 Series (760， 770， 780， 790) Vacuum Cleaning Robots 2 Bristle Brushes & 2 Flexible Beater Brushes 2 6-Armed Side Brushes 4 HEPA Filter Keep your home robot operating at peak performanceProduct DescriptionClean brushes keep your home robot operating at peak performance.We recommend that you clean Roomba's brushes every 1-3 uses (depending upon the amount of dirt and debris in your home).