Broad model compatibility: Compatible with X9 Pro, X10 Pro Omni Suggested replacement frequency: Maintenance once every 2 weeks. 3-6 months recommended replacement, depending on your usage frequency. Tool-Free Installation: Effortlessly replace parts on your Robot Vacuum with a simple, straightforward process that requires no additional tools, making it an easy-to-use cleaning tool. Side Brush Stockpile: Set includes side brushes, Meeting your at least a 6-month usage requirement. [Easy Installation] The side brushes are perfectly matched and the installation method is the same as the parts, which is easy to install, easy to use. Colour:Black Grey Material:plastic Package Contents: 6 x Side Brush / 12 x Side Brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.