Original iRobot Roomba S Series Corner-Sweeping Brush Replacement (3-Pack) - Genuine Vacuum Accessory for Efficient Edge Cleaning - Perfect for Hardwood Floors, Carpets & Pet Hair Removal

I had to buy more corner brushes back in Sept 2023. This time I chose to buy OEM (Original Equipment Manufacture) and I'm glad I did. Yes they cost more but my story is that when I bought a set of replica corner brushes (knock offs) they didn't last. The cheap ones would lose a brush arm almost every time Roomba went out to sweep. Before you know it my good deal turned out not to be so. Yes they were cheaper up front but that's it. I still have the original corner brush head on the sweeper with all brush arms intact. Those were put on in September 2023. It goes back to the saying "you get what you pay for".Now...why only a 4 star rating?The one thing I don't like is that the brushes are easy to install but the plastic you screw into is soft and very easily stripped. It's to the point now that I have to super glue the brushes in place. I works but it's a pain.