What's In The Box: 2 x Main Rolling Brushes, 6 x Filter Sets, 6 x Side Brushes. The Replacement Parts are Compatible with eufy RoboVac 11S, 15T, 30, 30C, 15C, 12, 25C, 35C, Robot Vacuums. To keep your vacuum cleaner running at peak performance, Please clean the filter once per week( twice per week in homes with pets) and replace it every 2-3 months. Please maintain the combo brush every month( every 2 weeks in homes with pets) and replace it every 5-6 months. Please maintain the side brush once per week( twice per week in homes with pets) and replace it every 3-4 months. The High-Efficiency HEPA Filter captures up to 99.5% dust, dirty, pet hair, and small particles. The Roller Brush superiorly pick up pet hair, dirt, dust, and debris and works well on floor typeshardwood, carpet, tile, and stone. The Side Brush helps you get deep into corners and right up against walls and base boards to ensure superior cleaning area. Shipping with a strong box to prevent from being damaged in transit. It is easy to be replaced and installed on your robot vacuums. No additional tools are required.