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These are not genuine. I've had the brush on for a day and my S5 pauses mid clean saying I need to clean the brush because it's stuck (when it isn't). I previously had the filters in for a month and constantly got 'filter is clogged' errors. Turns out the filter doesn't filter fine dust which then got into the motor requiring complete disassembly to clean (takes hours). I would recommend spending more in genuine parts so your $500 vacuum stays working.
Have not had to use or substitute all the different parts but assume as some time that they will all be necessary to keeping Roborock in great working order. Regarding this review do not understand the necessity to rate thickness or what that feature has to do with this accessories kit
If you have a roborock cleaner, you totally need this handy replacement item kit. I can have mop heads and vacuum filters waiting to be cleaned and this kit comes to the rescue before I wash the used ones! I haven't used the replacement brushes, but feel good that they're there when the time comes!