Mussokina 24PCS 3D Printer Nozzles MK8 Extruder Nozzles 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 1.0mm for Ender 3 5 Makerbot Creality CR-10 with a Storage Box

These are so inexpensive that I expected them to be poor quality. But it was such a good deal I decided to take a gamble and try anyway. I'm glad I did. I haven't measured the openings or anything, but on my Ender 3, every one that I have tried has worked excellent. I can easily achieve the actual wall thickness I'm aiming for with minimal tuning, and the prints come out looking great. So far I have used several of the .4mm nozzles (with PLA and PETG), the .5mm (with Hatchbox Wood PLA), and a couple of the .6mm ones (with PLA and PETG). Haven't tried the larger ones yet, but when I do have a reason to try a .8 or 1.0 nozzle I fully expect these to work great. Also haven't tried the .2mm nozzle, but I'm also optimistic.Will probably pick up a few more of these packs. You can never have too many nozzles on hand, and at this price point, if one gets crusted with burnt-on filament, dropped and deformed, or otherwise messed up, I can literally just toss it and put on a brand new one, I'll be out a few cents.

They holes all appear to be very circular. From visual inspection, the nozzles appear to be well made.They work fine and the print comes out nice and I'll be buying more.

They work, feel kind of cheap, but do the job.

I only tried a couple as it's not every day you swap your nozzle but those worked great on my printer and all nozzles look good quality.Pretty cheap for what's effectively a printer lifetime of nozzles

This fits my ender 3 printer and does exactly what it's supposed to. They give you a lot of different sized knobs for each application.

The threaded part of the nozzle is too short. In order to properly install the nozzle the threaded part of the nozzle must butt up against the threaded part of the heatbreak. The nozzle (except for the threads) should not touch the heatblock. In order to do this the heatbreak has to be threaded too far into the heatblock, leaving none of the unthreaded part of the heatbreak exposed. This will cause heat creep and clogging. Leaving a gap between the heatbreak and the nozzle in the heatblock will lead to filament leaking. This are simply too short for proper installation.

These have worked great excellent and have excellent build quality. Just as good if not better than what originally came with the 3D printer.

Lots of nozzles. Clog one - swap it out. It was also good to have various sizes to experiment with for quality (small diameter) and speed (large diameter).