General description Replacement Parts Main Brush, Side Brush, and HEPA Filter compatible with IRobot Roomba S9 Robot Vacuums. These accessories are made of high-strength, environmentally friendly materials, ensuring durability and effective cleaning performance. They help reduce the penetration of dust, pollen, and other allergens into the air. Technical specifications Material: Plastic Color: As shown Allowed measurement error: +/- 1-3 cm Package Contents 4 x Rolling Brush 6 x Side Brushes 6 x Filters 1 x Screwdriver 1 x Cleaning Brush Usage It is recommended to replace the brushes and filters every 1 to 2 months to maintain optimal cleaning performance.