Some time ago something went wrong with my S6 MaxV. Turns out he ate a small magnet that confused him to death. Searching for a problem I replaced the filter and main brush with the ones present here. After finding the magnet, it turned out that the vacuum cleaner works perfectly, except that the dust container does not fill up as usual. I thought the problem was with the new filter I installed so I bought a Roborock proprietary filter but that didn't fix the problem. After a while I noticed that the main brush wasn't spinning and only dust was collecting on the underside of the brush. I bought a Roborock brand brush and it started spinning again and the dust box was full after the first start. The brushes are almost identical, except the wheels are offset by a millimeter or two. Apparently that's enough for it not to work with my block. I would give 3 stars as the main brush makes up the majority of the purchase but considering everything I got here was a bit more expensive than the price of a single Roborock brush I still think it's quite a is good business. Everything else included works great. I probably won't buy this again if the brushes don't work, but if they work for your device it's a killer deal.