Side Brush × 2, Compatible with E20Compatible with eufy Robot Vacuum 3 in 1 E20. To keep your E20 Robot Vacuum operating at peak efficiency, replace the brush every 36 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. Weve