Duogreen Replacement Filter for iRobot Roomba 550 series， AeroVac 20938， 3-Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Duogreen replacement filter for irobot roomba aerovac 20938</li><li>Compatible with irobot roomba 550.</li><li>Includes three replacement filter.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51L8BTLR22L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51CTpxSoteL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51xe99nvjML.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51fPMY99lIL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41fboiV%2BjrL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/418w5pEsfVL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51nebCmo69L.jpg" noproxy>