Higher Flow: Our unique high-flow internal geometry enable these nozzles to significantly boost your volumetric flow rate by up to 70%, allowing you to print faster! Available in Brass and ObXidian variants. The Brass versions are suitable for every day high flow printing with materials such as PLA, PETG and ASA. Opt for the ObXidian version if you print with abrasive/filled polymers. With a wear resistance that is orders of magnitude higher than any generic hardened nozzle, ObXidian is really hard. This is achieved by pairing a tool steel insert with our E3DLC coating. This specially formulated coating also embeds non-stick properties into the Nozzle itself, resulting in considerably less plastic build-up around the Nozzle. Easy identification. Each Nozzle has its size engraved into it. Simplified nozzle changing. Changing a nozzle on your Prusa printer just got much easier! Waste less time changing your nozzles and more time experimenting with different sizes and materials. Please note: These nozzles are only compatible with Prusa MK4 and XL 3D printers.