10 star. Amazon only let's me put 4 star in put in 5 star. But anyway this nozzle with the black Dimond tip is bad a s s. Must have. Pla pro filament lines are gone just one part Dimond tip is great every person printing needs one or 2 I wish someone would have told me this get one small investment for way better printing

Excellent tips! Can run anything through these babies! I have a ruby .4mm and a tungsten carbide .6mm for my q1 pro. Runs as good or better than brass, which is very nice. Only problem is i have a bunch of brass and hardened steel nozzles that just sit here now haha.Edit:6 months later, these were originally NOT nickel plated which i thought nothing of but after 6 months of nozzle changes the hex part of the nozzle has shown a lot of wear. You change the nozzles when the hotend is heated so this leads to more malleable metal (the body is already a somewhat soft metal). I won't change my star rating as these are excellent as far as extruding, the ones i got however will have to be replaced soon. The nickel plating should make these last forever if you want them.

So far, this nozzle has held up well against PA6-CF, PA6-GF and other similar abrasive filaments. Be sure to PID tune after installing, though.. I did have some issues with wide temperature swings because I had hardened nozzles in prior and hadn't retuned before using this nozzle.

Using it with my Q1-Pro. I can finally print glow-in-dark and CF filaments without worrying. Works perfectly with the default nozzle settings.

I’m seriously impressed with the DUROZZLE Diamond PCD Tip nozzle—it’s hands down my new favorite. The build quality is top-notch, and it handles even the toughest, most abrasive filaments with ease. Every print I’ve done with it has come out clean, consistent, and just plain beautiful.Honestly, I’m kicking myself for not switching to this sooner. If you’re running a QIDI printer and need a nozzle that can keep up with high-performance materials, this one’s absolutely worth it.