iRobot Roomba 600/700 Series Brush Gears Works with Gray CHM (select 500 series)
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<b>[Product Information]</b><br>
<ul>
<li>6 Replacement Gears for roomba 600/700 (some 500)</li>
<li>Works with Gray CHM</li>
<li>Not compatible with the red or green CHM</li>
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