Elegoo Hardened Steel Nozzle Kit - Neptune 4 Series

Built for the Filaments That Destroy Brass.

Carbon fiber. Metal-infused. Glass fiber. Wood fill. Glow-in-the-dark. These are the filaments that makers reach for when the job demands strength, aesthetics, or performance that standard PLA and PETG can't deliver — and the same filaments that will destroy a brass nozzle in a matter of hours. The abrasive particles suspended in these materials act like sandpaper on softer metals, widening the nozzle orifice with every print until your diameter drifts, your extrusion becomes inconsistent, and your print quality collapses.

That's what hardened steel is for.

This Elegoo hardened steel nozzle kit gives you three diameters — 0.4mm, 0.6mm, and 0.8mm — each machined from high-grade tool steel to deliver outstanding wear resistance, excellent high-temperature performance, and smooth internal geometry optimized for the Neptune 4 series platform. These nozzles handle the abrasive load that destroys brass without deterioration, maintaining their orifice diameter and internal surface quality through extended use with the most demanding materials.

The precise manufacturing and smooth inner bore also pay dividends even on standard filaments — consistent extrusion, finer detail, reduced clog risk — making this a solid upgrade for any Neptune 4 user who wants nozzles that go the distance regardless of what's loaded in the extruder.

⚠️ Important — Verify Version Compatibility Before Purchase:

• Neptune 4 Plus / Neptune 4 Max: Compatible with both Ribbon-Cable and Type-C versions
• Neptune 4 / Neptune 4 Pro: Compatible with Type-C version ONLY

Check your printer's version before ordering. Type-C vs Ribbon-Cable versions use different hotend assemblies. If unsure, check the port on your print head or refer to your printer's documentation.

The right nozzle for the toughest filaments — perfect for:

• Carbon fiber reinforced filaments (PLA-CF, PETG-CF, PA-CF) — abrasive particles will wear brass rapidly
• Metal-infused filaments (copper fill, bronze fill, stainless fill) — highly abrasive, require hardened steel
• Glass fiber filaments — extremely abrasive, among the hardest on nozzles
• Glow-in-the-dark filaments — contain abrasive phosphorescent particles
• Wood fill and stone/ceramic fill filaments — abrasive composite materials
• High-temperature printing applications requiring thermal stability
• Neptune 4 Plus and Neptune 4 Max owners who frequently print specialty filaments
• Makers who want a durable nozzle that works across all filament types, including abrasives

Hardened Steel vs. Brass — Which Do You Need?

Choosing Your Nozzle Diameter

• 0.4mm — the standard diameter. Best detail resolution, suitable for all compatible filaments and everyday printing. Start here if you're unsure
• 0.6mm — the sweet spot for high-speed printing. Faster than 0.4mm while retaining solid detail and clean surfaces
• 0.8mm — fast production printing. Ideal for large functional parts, structural prints, and jobs where speed outweighs fine surface detail

Key Features

• Wear-Resistant Hardened Steel — high-grade tool steel resists the abrasive particles in carbon fiber, metal-infused, and composite filaments. Maintains orifice diameter and internal surface quality through extended use
• 3 Diameters in One Kit — 0.4mm, 0.6mm, and 0.8mm for precision, balanced, and fast production printing across all compatible materials
• Excellent Heat Resistance — withstands elevated printing temperatures without deforming or failing, ensuring reliable performance even at the high temps required by engineering-grade filaments
• Precision Machined — smooth internal bore minimizes turbulence, prevents filament sticking, and reduces clog risk across a wide range of materials
• Superior Print Quality — precise geometry and smooth internal surface deliver consistent extrusion and fine detail even with challenging filaments
• Wide Filament Compatibility — suitable for PLA, ABS, PETG, TPU, and all abrasive specialty filaments, including carbon fiber, metal fill, and glass fiber

Compatibility

Not compatible with Neptune 4 / Neptune 4 Pro Ribbon-Cable versions.