FYSETC Prus i3 Hotend MK3S+ J-Head Extruder Kit 24V 40W for 1.75mm Direct Filament Compatible with Prus i3 MK3/MK3S/MK3S+ and Other E3 V6 Remote Printhead Printer with Silicon Cover and 0.4mm Nozzle

Works great, good heating and fit my printer exactly.

I bought this hotend to replace the stock hotend in my Prusa MK3S+ after a heating element wire broke. After reading other reviews, I was worried that the heatsink would not fit, or that the cable connectors wouldn't match. Fortunately this proved to be a non-issue; I had the hotend installed within 30 minutes with no issues. After running PID calibration, thermal calibration, and adjusting Z-height, I was producing great-looking PETG prints that would have been challenging with the stock hotend. The silicone sock is a great addition, keeping the hotend cleaner and better insulated. I'd absolutely recommend this hotend and might purchase a second as a backup.

This has been of a letdown. The silicon sock provided doesn't fit properly or otherwise comes loose and the thermistor does not fit the heat block correctly. It can't be locked down by the bolt that closes the gap in the heatblock. This means the silicon sock can pull the thermistor out of the heat block, killing a job and creating a thermal anomaly. Fitting it was easy. The PTFE tube needed to be trimmed to fit. Seems like it could be sized more accurately but I'd rather have too much than too little. This is a repeat purchase, initially as a spare, but the previous one had to be replaced when it jammed which makes me wonder if this one is going to have the same problem. All in all, decent value but maybe not as much peace of mind as I would like. Not convinced I'll order another as a replacement. EDIT: I have to knock this down to 1 star as it failed on me about months after buying it. It jammed in such a way I had to throw the whole thing out, with the cables. I could salvage nothing. Looking back at my orders, this isn't the first time. I don't think hot-ends are supposed to be consumables.

This hotend kit worked well for my printer and was a solid replacement part. Installation was straightforward enough, and once it was in place, it performed the way I expected.

It’s too early to tell how long this will last considering I have not even finished printing the first part yet but so far it is extruding prusa pteg filament really well. I initially had the original prusa hotend on order but the shipping date kept pushing out even a week after my purchase so I couldn’t wait any longer and took the leap of faith with this brand. If this holds well I will be a repeat customer. Update: Printed several other parts out of PETG without issues. This hotend rocks!

I upgraded my MK3.5S to an E3D Revo nozzle and it wasn't working properly so I bought this to go back to stock (I lost the original hotend). Perfect stock replacement. Passes all Prusa xbuddy tests.

The PTFE tube did not fit the unit. Had to reuse all of the old hardware with the exception of the extruder tip and the PTEF tube.

Installed just fine, printer calibrated OK, and the first 2 prints looked like it worked well. Then we discovered it was leaking, as we had blobs of plastic under the silicon boot falling onto the print bed. Attempted to loosen print nozzle to examine and it sheared off.

On right is original prusa left is what it came as. Got ripped off.

This does not fit the MK3S+ as advertised, as shown in the picture the ends are different.