General description Brand new and high quality replacement parts for iRobot Roomba S9 Robot Vacuum Cleaner. Made of high-strength and environmentally friendly materials, these accessories are easy to install and help maintain the cleaning performance of your vacuum. The HEPA filter effectively reduces the penetration of dust, pollen, and other allergens into the air you breathe. Technical specifications Material: Plastic Color: As shown Measurement allowed error: +/- 1-3 cm Package Contents 2 x Rolling Brush 6 x Side Brushes 6 x Filters 6 x Dust Bags 1 x Cleaning Brush Usage It is suggested to replace the filters every 1 to 2 months for optimal performance.