General description Replacement Parts Main Brush, Side Brushes, and HEPA Filter compatible with iRobot Roomba S9 Robot Vacuum Cleaner. These accessories are made of high-strength, environmentally friendly materials, ensuring durability and effective cleaning performance. The filter screen helps maintain the vacuum's efficiency while reducing the penetration of dust, pollen, and other allergens into the air. Technical specifications Material: Plastic Package Contents: 2 x Rolling Brush 6 x Side Brushes 6 x Filters 1 x Screwdriver 1 x Cleaning Brush Measurement allowed error: +/- 1-3 cm Usage It is recommended to replace the brushes and filters every 1 to 2 months to maintain optimal cleaning performance.