The iRobot 4415866 Roomba 800 & 900 Series Replenishment Kit comes with everything you'll need to keep your Roomba 800 & 900 Series robots operating at peak performance. Kit includes 3 AeroForce Filters, 2 Spinning Side Brushes, and 1 set of AeroForce Extractors. iRobot can only guarantee the quality and performance of authentic parts. Accessories and replacement parts manufactured by 3rd parties may have a negative impact on product performance or cause damage to your robot. Use of 3rd party replacement parts could void your robot's warranty.