I installed them on my Roomba 671 without any problems but they didn't work. The Roomba shook, made a horrible whirring sound, and stopped with an error message demanding the bins be cleaned. It was tight so I tried riding it without the yellow caps. This didn't work either. To see if my robot vacuum had gone bad, I tried running it without brushes and it picked things up more efficiently than with those brushes, and didn't get that error message at all.
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