Package Contents: A total of 24 pieces, 8 filters + 8 side brushes + 3 screws + 4 main brushes + 1 screwdriver + 1 small brush. These Roomba replacement accessories are for iRobot Roomba E5 E6 i7 i7+ i6 i6+ i3 i3+ i4 i4+ i8 i8 Plus e5154 i3152 i7156 J7 7150 vacuum cleaner. Premium Quality: Highly efficient filter materials are made of very durable and environmentally friendly materials, can block 99% of dust, mites, allergens and dirt with diameters of only 10 microns. It is recommended to replace the filter every 2 months, change the side brushes every 3 months, and replace the roller brush every 6 months, depending on your usage frequency. Easy to Install: Snaps into place for quick and effortless replacement. No tools required, easily replaceable filter and brush. Roomba accessories are easy to install and durable, effectively removing dirt and dust from corners and edges. Innovative Design: Dual opposing extractors with durable rubber profile effortlessly pick up and remove dirt