You can read all about ObXidian in our blog: https://e3d-online.com/blogs/news/rev...

ObXidian is our latest and greatest Nozzle offering, specifically designed for printing fibre-filled polymers. Unlike other abrasion-resistant Nozzles, ObXidian’s copper alloy construction has a similar thermal performance to Brass, making it a true drop-in replacement. Just use the same slicer profiles as for your Brass Nozzles.

With a wear resistance that is orders of magnitude higher than any other E3D nozzle, ObXidian is really hard. Several orders of magnitude harder than Nozzle X and indeed any other generic hardened steel nozzle. ObXidian is built to last, regardless of what you’re printing. This is achieved by pairing a tool steel insert with our new E3DLC™ coating. This specially formulated coating also embeds non-stick properties into the Nozzle itself. Meaning considerably less plastic build-up around the Nozzle.