Size: 20*16*6cm Product model: i7 i7 + E5 E6 series Package content: 2*main brush， 8*filter， 8*side brush， 1*screwdriver， 1*small brush， 1*universal wheel 1.Compatibility: The accessory kit is compatible with iRobot Roomba i7 i7 + E5 E6 series， these replacement parts are suitable for your vacuum cleaner. 2.What's in the box: 2 main brushes， 8 filter screens， 8 side brushes， 1 screwdriver， 1 small brush， 1 universal wheel. 3.High performance: Two high-quality rubber brushes are perfectly matched， one for removing dirt and the other for cleaning dirt. The side brush goes deep into the corners and edges to remove more dirt and debris. Replacing the filter can block dirt， pet dander and other particles as small as micrometers. 4.Easy to replace: In order to ensure that your sweeping robot runs with the best performance， it is recommended to replace the multi-face brush roller every 3 months， the filter every 1 month， and the side brush every half a month， depending on your usage frequency.