Notice:water tank filter is only Compatible With rbrck S5 S50 S51.if other models,pls don't choose option with water tank filter! Filter &Side Brush Water Tank Filter Mop Clothe Compatible With Mi rbrck S5 Max S6 MaxV S50 S51 Robot Vacuum CleanerType Vacuum Cleaner PartsVacuum Part Type FiltersCompatible With 11s rbrck S50 S51 S5 Max S55 S6 MaxV S5 T5 T6 E25 E35FeaturesUnique design, easy to clean the dust.-Nylon brush, it will not scratch the floor and furniture.-Suitable Compatible With Robot Vacuum Part Pack of Filter, Main Brush, Side Brush Compatible With / rbrck Vacuum Cleaner -in Vacuum Cleaner Parts from Home Appliances.Notes:1. Manual measuring, please allow 1 ~ 3mm error,thank you.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.