Zen Toolworks 3D Printing Extruder Kit for 1.75 mm filament. The body of the extruder is precision machined from aluminum and anodized black for a long lasting, tough finish. With this extruder, you are free to adapt the hot end nozzle of your choice. We have tested and had great success with JHead and MB nozzles, however, any 1.75 mm nozzle of your choice will work. This kit includes a Nema17 stepper motor, and adapter plate for your Zen Toolworks machine. The adapter plate is made from the same sturdy material that we use to construct our ZTW CNC Frames. Not only does this extruder work extremely well on our ZTW CNC platforms, but can also be used universally with many other 3D printers of your choice.