I have a 671 that uses the same side brush as the 800/900 series. These side brushes don't fit well because the screw doesn't fit in the hole provided.
Vacuum Cleaner Dyson Cyclone V10 Absolute Global, red/grey
86 Review
Robot vacuum cleaner Roborock S7 Global, black
125 Review
Professional vacuum cleaner KARCHER WD 3 Premium, 1000 W, yellow/grey
81 Review
Robot vacuum cleaner Roborock S6 MaxV RU, black
91 Review
Vacuum cleaner Deerma DX700, white
240 Review
Robot vacuum cleaner Roborock S5 MAX Global, black
298 Review
Xiaomi Mi Robot Vacuum-Mop Essential Robot Vacuum Cleaner, white
284 Review
Xiaomi Mi Robot Vacuum-Mop 2 Lite RU robot vacuum cleaner, white
198 Review