General description Replacement roller brushes compatible with iRobot Roomba series including i3, i4, i6, i7, i8, E5, E6, E7, and j7 vacuum cleaners. These multi-surface rubber dual roller brushes are designed to effectively remove dirt and debris from various floor types while requiring minimal maintenance. Technical specifications Compatible with iRobot Roomba models: i3(3150), i3+(3550), i4(4150), i4+(4550), i6(6150), i6+(6550), i7(7150), i7+(7550), i8(8155), i8+(8550), E5(5150), E6(6198, 6134), E7, j7, j7+ Material: High-quality PC Brush type: Multi-surface rubber dual roller brushes Usage It is recommended to replace the brushes every 2 to 4 months to maintain optimal performance of your vacuum cleaner. Other information Package includes: 2 sets of multi-surface rubber dual brushes