4 - iRobot Roomba AeroVac Bin Filters. Designed by FilterBuy to fit iRobot Roomba 500 &amp; Roomba 600 Series Vacuums.<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>4 AeroVac bin filters designed to fit iRobot Roomba 500 &amp; Roomba 600 Series Vacuums.</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>Roomba AeroVac bin filters are easy to install and improves overall performance of vacuum unit.</li><li>FilterBuy: Breathe Better!</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51GQO5OhV8L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/419Wb%2BD0BdL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/519rnDhg5PL.jpg" noproxy>