Scope of Use---The filter is accessory suitable for Cecotec Conga 3490 4090 series vacuum cleaner robot filters. Design Feature---The vacuum cleaner main brush is easy to remove dirt, dust and trash in corners and edges effectively. Especially your hair and your pets hair. High Quality---Made of high quality materials, high?strength, environmental friendly, more durable. Cleaning main brushes keep your home robot operating at best performance. Easy to Use--Great replacement rollers fit perfectly, no tools are required, you can replace the main brush in seconds. Main brushes are easy to remove and replace as part of routine maintenance. Easy to install, no tools required, make your vacuum cleaner and longer. After Sales Service---100% satisfaction guarantee. If for any reason you're not 100% satisfied, please let us know and our customer service team will do our best to help you.