Compatibility: Anker eufy rolling brush and brush guard (1 set), compatible with E35 and S2. Dual-Arm Design: Sweeps powerfully with no dust leakage for thorough cleaning. Anti-Tangle: The brush rotates to expose gaps during dust collection, and sheds hair to prevent tangling. You'll never have to stop and clean the brush yourself. Easy Installation: Effortlessly replace parts on your robot vacuum with a simple, straightforward process that requires no additional tools. Suggested Replacement: We recommend replacing every 3 months, depending on your usage frequency. Genuine Anker eufy Accessory: To protect your robot vacuum and extend its lifespan, we recommend using genuine replacement parts. Third-party alternatives may not be compatible and may affect performance.