Size: 20 * 16 * 6 cm Product model: i7 i7 + E5 E6 series Package contents: 2 * main brush, 5 * filters, 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. Package contents: 2 main brushes, 5 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 corners and edges to remove more dirt and debris. Replacing the filter can block dirt, pet hair and other particles down to microns in size. 4. Easy to Replace: To ensure your sweeping robot operates at its best performance, it is recommended to replace the multi-surface brush roll every 3 months, the filter every 1 month, and the side brush every half month. depending on your frequency