General description This replacement main brush set for iRobot Roomba vacuum cleaners includes 4 rubber brushes designed for high performance and compatibility with various models. The unique rubber tread design adapts to multiple floor surfaces, effectively removing everything from small dust to large dirt. Technical specifications Compatible with: iRobot Roomba i3, i3+, i6+, i7, i7+, E5, E6, E7 Includes: 2 sets of roller brushes Installation No tools required for installation Snaps together for quick and effortless exchange Usage Recommended to change the replacement kit every 2-3 months based on usage frequency Initial noise may occur when using the rollers for the first time, but will diminish with continued use