These nozzles look to be very well machined with a nice, smooth bore on every nozzle I've checked. These appear to be much better quality than the stock nozzles that came with my Ender 3.
I got the pack with multiple sizes to experiment with fine detail small prints and also less detailed, larger prints. Not sure I'll use the ones in between that often but it's really nice to have them on hand if I come across a project that needs a .3 or. 8 or whatever.
These nozzles are a great value and I will be purchasing more when the time comes.