Ruby Nozzles for 3D Printers MK8 E3D Prusa Ender3 (E3DV6, 0.4mm)

I can only speak for me but the nozzle I got has a pretty red ruby with the right size hole in it. Nozzle has already out lasted 3 SS nozzles.

These were on sale for the K1 model. I bought two and I was able to machine them down for two other sizes for my two printers.

Not the brand it was advertised as but seems good quality anyway, was not expecting it to be packaged like a cnc cutting tool tip since the other two I ordered in the past were just packaged in a bag, so that was a pleasant surprise.

Price point was good (though they keep going up and down). The ruby tip has stayed in place for several dozen hours of printing on PLA and PETG, including white and glow-in-dark. The later two hard on nozzles I've been told and why I try to stay away from brass now.The brass the Ruby is inserted in is holding it's color pretty well but starting to discolor now and I don't run above 240 on the nozzle temp, so the metal purity is fine IMHO. I'm using a .6 mm so you have to think about layer size compared to a .4. I read a long treatise on why a .6 is better than a .4 and most of that seems true - certainly faster.My one dig is that it oozes worse on filament change and end of print times, maybe because there's less friction in the Ruby surface - why I took one star off (and for discoloration now in case that's impending metallic failure at some point).I have a .4 of these I'll try soon to report on consistency/quality between them. Otherwise this is my go to nozzle.I've not had a blockage or other issues.

This nozzle performs extremely well. Quite an improvement over the plain stock brass nozzle. Print quality is excellent and requires no additional calibration -installation takes less than 5 minutes ,just swap it out and you are good to go. Great price too.

I bought this after so much reading and research I thought it was impossible to go wrong but here we are. I bought it for our printer I run the most aggressive filament on, tpu, silks and clear filaments to help with clogs. The machine was running great when the new nozzle arrived but I really wanted to try it so we put it on to give it a go... and no go. IT WONT FEED FILAMENT. The nozzle is so small I can't get my cleaning needle in without it scraping and a ton of resistance and I can't get through even one line of brim on any print before it completely clogs and won't feed at all. Changed the nozzle back to the one that was on it when this one arrived and had no problems so I know absolutely its the nozzle. I'm so disappointed as this was supposed to be an upgrade and for the expensive price its very sad to literally never get to use it. I would never recommend this to anyone unless you want heartbreak and a broken printer.

I really wanted to get into printing some glow-in-the-dark filament; and had seen horror stories of certain filaments just tearing through brass nozzles. There is certainly an argument to be made that brass nozzles are cheap and for the price of one of these 'exotic' nozzles, you could buy a dozen brass ones, but I don't want to deal with that. Waiting for print quality to deteriorate, then having to partially disassemble my extruder to get a wrench around the hotend (dumb design)...I tried hardened steel to really awful results. Even printing 20º over brass nozzle temps still somehow resulted in poor layer adhesion, poor bed adhesion - and all sorts of weird print quality issues. Most of these went away if I slowed down the print, but that's not worth it IMO. I really wanted to try a diamond nozzle after watching @ZachFreedman's review and factory tour on Youtube, but $100 is still real steep.Somehow only then I became aware of these Ruby nozzles and they seemed like the perfect combo of good thermals, durability, and price - so I took a shot. Long story short, I'm never going back.Print quality is amazing. I haven't compared the same print side-by-side, but I swear this nozzle prints silk/glossy filament better and leaves a shinier surface finish than brass. I've only run about 500g of glow filament through it so far, but so far, no nozzle wear. Still prints bang-on dimensions from when I calibrated my extruder just after swapping it in. I did wear a chunk out of a plastic trim bit at the top of my gantry where the glow filament was sliding over though!If you're here because you're not satisfied with your hardened steel nozzle - this is the fix. Is it an upgrade over brass if you're not concerned about wear? That's debatable. Also I've heard Titanium nozzles transfer heat better, too - but I haven't given them a shot. I don't have any reason to now!

This seems to work well as a makermade 300 x300 printer