Features:Package included:3pcs X Filter for iRobot Roomba 550/500/600 Series1.100%Brand new and high quality.2. Filters reduce infiltration of dust， pollen and other allergens.3. Prevents dust and dirt from escaping vacuum system.4. Filters maintain optimal cleaning performance.5. For use with iRobot Roomba 550/500/600 Series Vacuum Cleaning Robots with Aerovac binsNOTE:It's best to replace your brushes every 1 to 2 months whichwill bring your Roomba back to top cleaning performance.