SODIAL Filters Pack 3 Armed Side Brush Kit For iRobot Roomba Vacuum 700 760 770 780 Keep your iRobot Roomba operating at peak performance! The innovative brush reaches deep into corners and edges to remove more dirt, dust and debris. It can be easy to remove and replace as part of routine maintenance. Filters maintain Roomba's cleaning performance while reducing infiltration of dust, pollen and other allergens into the air you breathe. For best results, filters should be replaced every 2 - 3 months.