【Compatibility】This roller brush is compatible with iRobot Roomba i6+ i7 i7+ i3 i3+ E5 E6 E7 Wi-Fi connected smart mapping robot vacuums. 【High Performance】Snaps on for quick and effortless replacement. No tools required, easy to replace the main brush. This set works just as well as the originals, with a precise fit and easy installation. 【Multi-Surface Rubber Brushes】Uniquely designed with rubber treads to conform to different floor surfaces, removing everything from fine dust to large debris. 【Maintenance】Keep your robot in optimal working condition by changing the consumable replacement kit every 2-3 months, depending on your usage frequency. 【Value Pack】2 sets of roller brushes. (Note: Some noise may be generated when using the rollers for the first time, but this will disappear after use.)