The Duplicator 4 Extruder Upgrade Package
The fine folkes over at Wanhao have recently changed the MK7 extruder to the all new and MUCH better MK9 version; we obtained the parts needed to convert your old Duplicator 4 MK7 into the all new MK9 extruder and I think you'll like the change. All you need is included in this kit and it's as easy as swapping out a few screws and such. The main advantage to the new MK9 is that it's a better drive system so you will have less jams and failed prints as well as it's much easier to clear a jam if you do get one... you won't have to remove the fans and motors to work on the drive system with the new MK9. Check it out and see what you think; this is what is shipping standard now all the all new Duplicator 4X 3D Printer!