Perfect Compatibility:The Replacement Parts Kit Is Compatible With Roomba I7(7150) I7+(7550)/I7 I3+(3550) I3(3150) I6+(6550) Plus Vacuum Cleaner,Including Everything That You Need To Perform Regular Maintenance On Your Roomba I Series Robot. | | Dual Multi-Surface Rubber Brushes Is Uniquely Designed With Rubber Treads To Hug Different Floor Surfaces, Removing Everything From Small Dust To Large Debris. The Unique Flexible Rubber Brushes Hug Different Floor Surfaces, Staying In Close