I clean 3 AeroVac Filter and 3 Side Brush 6 Armed for iRobot Roomba 500 600 Series 100% Quality Guaranteed!!! Keep your iRobot Roomba operating at peak performance! For best results, filters should be replaced every 2 - 3 months. Professional Series Robots reaches deep into corners and edges to remove more dirt, dust and debris. Side brushes are easy to remove and replace as part of routine maintenance.