Nozzle 0.8 mm for Elegoo Neptune 4 / 4 Pro 3D printer — 1.75 mm filament, brass

Brass 0.8 mm extrusion nozzle designed for Elegoo Neptune 4 and Neptune 4 Pro 3D printers using 1.75 mm filament. This nozzle replaces the stock hotend outlet to provide a larger orifice for increased material flow, enabling faster deposition and coarser layer heights suitable for rapid prototyping, functional parts and prints where strength and speed are prioritized over fine detail. Compatible with common filaments such as PLA and PETG, the brass construction offers good thermal conductivity and straightforward mechanical installation on standard hotend fittings.

Advantages

The 0.8 mm brass nozzle allows higher extrusion rates and larger layer heights, reducing print time for large or less detailed objects. Brass ensures efficient heat transfer for stable melt flow while remaining easy to clean and maintain for general-purpose filaments. It is a direct-replacement form factor for the Elegoo Neptune 4 / 4 Pro hotend, enabling a simple swap without additional upgrades or calibration changes beyond standard retraction and temperature adjustments.

Suitable for

• Rapid prototyping and proof-of-concept models
• Functional parts requiring higher extrusion and mechanical strength
• Large-scale or coarse-detail prints where speed matters
• Filaments such as PLA, PETG and other common, non-abrasive materials

Key specifications

• Orifice diameter: 0.8 mm
• Filament diameter supported: 1.75 mm
• Material: brass
• Compatibility: designed for Elegoo Neptune 4 and Neptune 4 Pro hotend fittings
• Suitable layer height range: larger layer heights for faster printing (adjust per material and nozzle clearance)

How to use

Power off the printer and allow the hotend to cool before replacing the nozzle. Heat the hotend to a moderate printing temperature to loosen any residual filament if necessary, then carefully remove the existing nozzle with an appropriate wrench. Screw in the 0.8 mm brass nozzle by hand until snug, then tighten to the recommended torque using a nozzle or socket wrench while avoiding excessive force. After installation, recalibrate Z-offset and adjust print settings such as temperature, extrusion multiplier, retraction distance and print speed to account for the larger orifice and higher material flow.

Usage recommendations

Use the 0.8 mm nozzle for prints that benefit from faster material deposition and increased part strength; avoid abrasive filaments such as carbon- or glass-filled blends which will increase wear on brass. Monitor first-layer adhesion and adjust travel speeds and extrusion settings as needed to maintain dimensional accuracy and surface finish.