iRobot Roomba 600/700 Series Brush Gears Works with Gray CHM (select 500

• 6 Replacement Gears for roomba 600/700 (some 500)
• Works with Gray CHM
• Not compatible with the red or green CHM

Replacement Brush Deck gears for roomba select 500 series + 600/700 series. Works with the Gray CHM. These are not compatible with the red or green CHM