One of the big hassles of 3D printing, is keeping having problems with your extruder. It happens quite often that the filament gets stuck and the extruder is not able to push the filament any more. That's why Micron E.M.E Ltd has introduced an all-metal, "J style" hot end, featuring a detachable filament guide and nozzle module "DFGNM". All parts are made by a CNC machine. The all metal design allows printing over the wide range of plastic materials up to 300° celsius.