iRobot Roomba 500 Series Right Wheel Module<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Genuine iRobot replacement part</li><li>Easy to change - includes all hardware</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41b0xA1wrkL.jpg" noproxy>