This is upgraded single head MK8 extruder, which has outstanding quality and the best performance for DIY and professional systems. By simply adding a holder, you can assemble your own dual head extrusion.With 42BYGHW818 stepper motor, you will find it easy to solve the problems of uneven extrusion, regularly plugging and material reloading. With Special ceramic insulation cotton ensures the stability of heating ,saving electricity. Direct transmission, without the heavy gears, compact size and weight, A variety of specifications to choose, the most suitable is the best.