Compatible with eufy Robot Vacuum Omni  C28/E25/E28/S1 pro. To keep your Robot Vacuum  Omni E28/E25 operating at peak efficiency, replace the brush every 3 months, depending on usage frequency. Soft, flexible bristles clean effectively without damaging floors or furniture. No tools required, easy to replace the side brush. Important Note: For the best performance and to extend your robot vacuum's lifespan, we strongly recommend using authentic eufy replacement parts. We’ve received customer complaints about issues with non-compliant sellers providing substandard alternatives.