Package contents: 24 pieces in total, 8 filters + 8 side brushes + 3 screws + 4 main brushes + 1 screwdriver + 1 small brush. This Roomba replacement accessory is suitable for the iRobot Roomba E5 E6 i7 i7+ i6 i6+ i3 i3+ i4 i4+ i8 i8 Plus e5154 i3152 i7156 J7 7150 vacuum cleaner. Premium quality: High-efficiency filter materials are made of extremely durable and environmentally friendly materials that can block dust, mites, and allergens and remove 99% of dirt. Diameter of only 10 microns. It is recommended to replace the filter every 2 months, the side brushes every 3 months, and the roller brush every 6 months, depending on your usage frequency. Easy installation: Quick and effortless replacement. No tools required, filter and brush are easily replaceable. Roomba accessories are easy to install and durable, effectively removing dirt and dust from corners and edges. Innovative design: Two opposing vacuums with a durable rubber tread that pick up and remove dirt and grime from smooth