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Robot vacuums, like the trusty iRobot Roomba, are built to handle a variety of obstacles with finesse. They can gracefully conquer ramps, inclines, bumps, and various thresholds, making them versatile cleaning warriors. Now, when it comes to the Roomba’s threshold-tackling superpower, it can comfortably handle obstacles up to 5/8 inches or approximately 15.8mm in height.