Packing List : Edge-Sweeping Brushes X4, ,Screw X4 | | Accessories Kit:This replacement parts kit compatible with iRobot Roomba i7(7150) i7+ Plus(7550) i6(6150) i6+ Plus(6550) i3(3150) i3+ Plus(3550) i4(4150) i4+ Plus(4550) E5(5134) E6(6198) vacuum robot cleaner. | | High-quality corner brush: The innovative corner brush can penetrate into corners and edges to remove more garbage. As part of routine maintenance, it can be easily disassembled and replaced. | | Replacement Frequency:Recommend to replace the spare parts every 2months to keep your Robotics cleaner working with High-Performance. | | Full service? If you are not satisfied with the replacement accessory side brush you purchased, please