The 12V Revo Micro is a lot smaller and lighter than average, with the smallest heatsink E3D has designed yet. This hot end weighs only 30g, so you can get more speed out of your printer. The Revo Micro can be used for both Bowden and Direct drive printers.
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E3D Rapidchange Revo nozzles are easy to change at room temperature, without using extra tools.
Note: The Revo Micro fan must be connected using a 5V regulator unless it connects directly to a 5V pin.