The E3D heat break is engineered to perfection. The heat break's task is to prevent all the wattage being generated in the heater block from traveling up the filament. E3D's heat break does this better than most. The heat break is a considerably complex item on an E3D hotend. If you compare E3D's heat break to others, you will begin to notice the others are basically a piece of all-thread drilled out, and often not very straight. Just another reason why the E3D hotend is THE choice.
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