Review on DLD Replacement Accessory Kit for iRobot Roomba i7 i7+/i7 Plus E5 E6 Vacuum Cleaner - 2 Sets of Multi-Surface Rubber Brushes, 4 Side Brushes, 4 Filters, and 1 Handy Tools by Ian Welch

They do not fit properly. After installing iRobot sounds terrible. More like a tank than a robot, it only sounds normal when it's flat on the carpet. On hardwood or an intersection, the new rollers stop and squeak like tank tracks. I can hear it from the second floor to the first floor while the movie plays in surround sound!