32PCS Mk8 Nozzles 3D Printer Extruder Nozzles Hardened Steel, Stainless Steel, Brass High Temperature Pointed Wear Resistant Nozzle 0.4mm,Compatible with CR-10, Ender 3/ V2 Ender3 pro,Prusa i3

This is a great buy for any 3D printer owner. At this price, replacing the nozzles is a sensible alternative to the challenge of cleaning them. (But - obviously - you can still hold onto your old nozzles and do a big bulk cleaning to run them through the use-cycle again... Still - these are great.)

When using the steel nozzles, there were a whole host of issues, most likely due to a difference in the hardness of the nozzle and the increased thermal resistance of steel, as a word of warning- if you are running a stock heating block - it may not be powerful enough to overcome the thermal resistance of the steel used

Easy to use, thread in smooth, well constructed for easy flow of the filament without clogging. Came with cleaning needle and … another wrench! Lol but useful none the less. Great value for the price.

I particularly liked the fact that this kit includes hardened steel nozzles, which are necessary for abrasive filaments like carbon fiber. The cleaning needles are a help, but I often just treat these as a consumable - if the clog up, I toss them and replace them. Fit perfect on my Ender 3. Recommended

Ever since I got these I thought something had gone wrong with my printer. No amount of adjustments would help. Regardless of whether the steel or the brass, the prints would always come out awful. I started noticing that when I did get good prints, it was from old nozzles I had. Finally I started testing these nozzles with the same configuration against others I had of the same size (the only difference was making sure the bed was leveled each time.) Without exception I had great prints with other nozzles and awful with these.

Nozzles constantly clogs or messes up prints. Slapped an old nozzle in problems stop. I dont know if its a bad batch, or they just bad in general. The tool that was included is nice.

Nozzles are showerer than expected for a Prusa MK2.5s and Prusa Mini. This means you will hit the heatblock without an gap which will cause you to have a filament leak. You will need to adjust your heatbreak down to close the gap but you may not be able to. These are usable but it would be better to get nozzles that are the right length.

Was having extrusion problems after I put these on and noticed that the hole size in nozzles that are marked identical sizes vary which suggests poor tooling. Swapped them out and extrusion improved drastically. I was having the same problem across multiple nozzles from this pack.

Tried to replace the nozzle. Striped when using the wrench. Seems completely fuzed to the hotend. Total trash waste of money.

I like the assortment of nozzles and materials, all packaged in plastic box.