I bought this brush to replace my botvac D85 OEM combo brush. I was skeptical at first and expected poor or ill-fitting bristle quality. To my pleasant surprise, the quality was as good as the original brush that came with the vacuum. Also, it seems that the bristles and the plastic part can offer a better contact with the ground. They appear to be a few millimeters longer than the OEM models. I use the vacuum every other day and have been using it for about a month now so remains to be seen how well the brush will hold up with continued use. However, so far everything has been fine. I will update over time to give a good definition of lifespan. Overall this is a great replacement for the OEM model.
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