Okay, so I’ve been running this ruby nozzle on my Neptune 4 Max for about 3 months now, and here’s the tea: it’s a game-changer. I print a LOT of carbon fiber PETG, and my brass nozzles used to wear out faster than my patience with bed leveling. Not this one—still looks brand new.

The thermal conductivity is surprisingly good thanks to the brass body. No weird temp fluctuations mid-print like some hardened steel nozzles I’ve tried. But heads up—you might need to bump temps 5-10°C higher than usual (I run mine at 220°C for PLA now).

Biggest win? Zero clogs. The funnel shape actually works—no more scraping burnt filament gunk from dead corners. And before you ask: yes, it handles regular PLA/ABS like a champ too. Overkill? Maybe. But after replacing nozzles every few weeks, the $40 price tag feels justified.

Only gripe? Wish the packaging included a temp adjustment cheat sheet. Took me two failed prints to dial it in. Still—if you’re tired of nozzle roulette, this ruby tip is worth its weight in... well, rubies.