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iRobot Roomba 400/Discovery Side Brush Set
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iRobot Roomba 4330 Battery - Replacement for the iRobot Roomba 400 Series Robotic Vacuum Cleaners - Walmart.com
6pcs Filter Side Brush Replacement Kit for iRobot Roomba 400 Discovery Series Sweeping Robot Vacuum Cleaner Spare Parts - AliExpress
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User manual iRobot Roomba 400 (English - 28 pages)