iRobot Roomba Model 4000, 400 Series Original Brush Beater Brushroller Kit. Includes all shown in first picture. New unused, but please note: The small escape is missing from the brush roller (see last pic) you can pop this off your old roller and re-use it with this one. Very simple. Shipped within one day of payment. ********* The iRobot Roomba Model 4000 Brush Beater Brushroller Kit is a genuine replacement part designed specifically for the iRobot Roomba vacuum cleaners in the 400 series. This brush roller is compatible with the Roomba model 4000 and is essential for maintaining the cleaning efficiency of your robot vacuum. With the brand's quality assurance, you can trust that this brush roller will provide the same reliable performance as the original part of your iRobot Roomba vacuum.