Generic 1.75/0.4mm Nozzle Print Head MK9 Extruder Hotend with NTC 100k Thermistor and 700mm PTFE Tube for Reprap Prusa i3 3D Printer

I give this 5 stars, since it works well. I was upgrading from an MK7 (plastic body), which is similar. I thought the price was reasonable. I've only used mine with a 1mm nozzle (not included with the extruder). I'm not sure how the included 0.4mm nozzle performs yet. As an extruder, it works very well. On flexible TPU, I did experience material periodically ridding up the idle/follower bearing. I was disappointed the heater block was absent a few threaded holes, that I was accustomed to on my setup. I just reused the aluminum heater block that I had, and used the new heater element. I've gotten away from grub srews, and use socket cap screws, since they are more robust. Also, there was no ferrule crimped on the thermister, and it's temps seemed off by 10 degrees C from what I was used to. I'd recommend though. If you shop around you can find it cheaper, but may take longer. Delivery for mine from Anycubic was quick. Thanks!

There were problems with the Print head and Anycubic went above and beyond to resolve the issue.

The filament does not align with the pipe and there is no adjustment. Also, the bearing does not spin even with the bolt loose. I've heard from others that this is a good extruder so I am not sure if I received a bad batch. Hopefully someone from anycubic will contact me.

One of the best extruders out there. Super fast and works great with any of the two filaments.