iRobot Roomba 800 900 Series AeroForce Replacement Filter. Designed by FilterBuy to replace all iRobot Roomba 800 &amp; 900 Series Vacuum Filters<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Roomba AeroForce 800 &amp; 900 series filters are easy to install and improves overall performance of vacuum unit.</li><li>Replace the iRobot Roomba filter every 2-3 months to maintain Roomba's cleaning performance while reducing infiltration of dust， pollen and other allergens.</li><li>Ships in simple， easy to open packaging and minimizes waste.</li><li>FilterBuy: Breathe Better!</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51%2BUmxBQllL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41Ui4oe2XAL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/411TdA6-EdL.jpg" noproxy>