General description Made of high-quality material, these replacement main brush rollers for the X9 Pro Robot are designed for easy removal and replacement as part of normal maintenance. It is recommended to replace them every 2-3 months to maintain optimal performance. Technical specifications Color: Photo Color Material: Plastic Measurement allowed error: +/- 1-3 cm Compatibility and accessories Compatible with X9 Pro Robot Package Contents: 2x roller brushes Installation Easy to install Usage Replace every 2-3 months for best performance Other information Light reflection and different displays may cause slight color differences between the item and the picture. Please note that a slight color difference does not affect the use of the product.