Prusa Nozzle Guide

Prusa Nozzle Guide for Nextruder Printers

Choosing the right nozzle can make a significant difference to your print quality, speed, and longevity. This guide covers every Prusa Nextruder nozzle type — from everyday brass to diamond-tipped precision — so you can pick the perfect match for your filament and application.

Compatible Printers

• MK4 family
• XL family
• MK3.9 family
• CORE One family

How to Identify Your Nozzle Size

You can identify the nozzle diameter by the number of dots, or marked number, around the rim of the nozzle. Non-E3D Prusa Nozzles also have a size marking on their metal tube. Getting this right matters — using the wrong size can affect flow rate, print quality, and even cause clogs.

Choosing the Right Nozzle Diameter

Smaller Diameters (~0.25 mm) — Maximum Detail

A 0.25 mm nozzle delivers exceptional precision and fine detail, but comes with trade-offs. Composite filaments with particles (carbon fibre, Kevlar, glass) are a no-go — they will clog or damage the nozzle. Flexible filaments can also be problematic due to the higher extrusion pressure required.

High-temperature filaments like ASA and PC Blend work well at 0.25 mm, provided they contain no composite particles. Be prepared for long print times — 24 to 100+ hours is not unusual, even for smaller objects.

Larger Diameters (>0.6 mm) — Speed and Strength

Larger nozzles trade fine detail for speed and structural strength. Layer lines are thicker, so intricate surface details are less defined — but functional parts can be stronger due to the greater volume of material per line. Note that the increased mass of material may also increase warping risk with materials like ASA or PC Blend.

Nozzle Size & Material Compatibility

* Hardened nozzle required

Pro Tip: Avoid Clogs with Quality Filament

To minimise clogging risk, we recommend using Prusament, which has a tight diameter tolerance of ±0.02 mm. For a full breakdown of filament compatibility, refer to Prusa's Material Table.

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Prusa Nozzle Types

Prusa Nozzle Brass — The Everyday Workhorse (click on the picture below to take you to the product page)

Your printer ships with a Prusa Brass Nozzle — and for good reason. Made from high-quality brass with excellent thermal conductivity, it handles a wide range of non-abrasive filaments with ease. The integrated heatbreak design means no preheating is required for installation and no PTFE tube is needed to guide filament.

Brass nozzles are cost-effective, easy to clean, and deliver high-quality surface finishes. Just avoid abrasive filaments — they'll wear brass down quickly.

Best for: PLA, PETG, ASA, ABS, PC Blend, Nylon

Prusa Nozzle Brass CHT & E3D Prusa Nozzle: High Flow Brass — Speed Without Compromise - (click on the picture below to take you to the product page)

Note: Not recommended for use with the MMU3.

Want to print faster without sacrificing quality? The CHT (Core Heating Technology) and E3D High Flow Brass nozzles are engineered to do exactly that. Their innovative internal geometry splits the filament into multiple streams — 3 channels in the CHT, 4 in the E3D High Flow — dramatically increasing the surface area exposed to heat.

The result: faster, more consistent melting at lower temperatures, higher print speeds, and improved surface detail — even on large or complex models.

Best for: High-speed printing, large objects, materials requiring high melt temperatures

Nozzles for Abrasive Filaments

Composite filaments — those containing carbon fibre, Kevlar, glass, or metal particles — are highly abrasive and will rapidly degrade a standard brass nozzle. If you're printing with these materials, you need a tougher nozzle. Not sure if your filament is abrasive? Always check with your filament supplier.

Recommended Cleaning Methods

• Non-abrasive cloth or rag for external cleaning
• Cleaning filament for internal cleaning

Avoid These Cleaning Methods

• Acupuncture needles or brass brushes — these can damage coatings
• Cold pulls on ObXidian nozzles — these can tear the WS2 coating

Prusa Nozzle ObXidian™ — Built for Abrasives - (click on the picture below to take you to the product page)

The ObXidian™ is Prusa's go-to nozzle for abrasive materials. Constructed from hardened steel with a corrosion-resistant coating, it maintains its hardness even at elevated temperatures — making it ideal for carbon fibre and other demanding composites. Expect significantly longer nozzle life compared to brass.

Best for: Carbon fibre, abrasive composites, high-temperature printing

Prusa Hardened Nozzle (Nickel Plated) — Tough and Versatile - (click on the picture below to take you to the product page)

The Nickel Plated Hardened Nozzle strikes a balance between durability and smooth extrusion. The nickel coating reduces friction and material adhesion, making it easier to keep clean, while the hardened steel core resists wear from abrasive filaments. It's an excellent choice if you regularly switch between abrasive and non-abrasive materials.

Best for: Mixed-use printing, abrasive and non-abrasive filaments, frequent material changes

E3D Prusa Nozzle: High Flow ObXidian™ — Speed Meets Durability - (click on the picture below to take you to the product page)

The High Flow ObXidian™ combines the abrasion resistance of ObXidian with the high-flow internal geometry of the E3D range. Optimised for maximum melt capacity, it enables faster extrusion rates without compromising layer adhesion or detail — perfect for large-format prints where speed and longevity both matter.

Best for: Large prints, high-speed abrasive filament printing, reduced downtime

E3D Prusa Nozzle: Standard Flow ObXiDian™ 500 - (click on the picture below to take you to the product page)

Powered by brand new ObXiDian® 500 technology, these premium nozzles are an official collaboration between E3D and Prusa. The unique coating on the nozzles makes them at least 5 times more wear resistant than our popular ObXidian range! Users will get exceptional wear-resistance that effortlessly outshines other hardened nozzles. This long-lasting, simple upgrade allows you to easily achieve pristine prints with ANY filament over and over again!

E3D Prusa Nozzle: High Flow ObXiDian™ 500 - (click on the picture below to take you to the product page)

• Boost your flowrate with E3D's unique 4-channel insert.
• Built to last – at least five times more wear resistant than ObXidian®.
• Print ANY filament, even glow in the dark filaments, with the super abrasive-resistant nozzle.
• Non-stick nozzle that prevents plastic build-up for pristine prints and reduced print crashes.
• Effortless upgrade - no hardware modifications needed.
• Officially approved and sold by Prusa.

E3D Prusa Nozzle: DiamondBack — The Ultimate in Wear Resistance - (click on the picture below to take you to the product page)

For the most demanding applications, the DiamondBack nozzle is in a class of its own. Developed in collaboration with E3D, it features a solid Polycrystalline Diamond (PCD) tip — not a coating, but a genuine diamond insert made from thousands of bonded diamond crystals. This delivers unmatched hardness and wear resistance while avoiding the brittleness of single-crystal diamond.

If you're regularly printing with metal-filled, ceramic, or engineering-grade fibre filaments, the DiamondBack will outlast every other option on the market.

Best for: Metal-filled filaments, ceramic composites, engineering-grade abrasive materials

Nextruder V6 Nozzle Adapter - (click on the picture below to take you to the product page)

Want to use E3D V6 nozzles on your Nextruder? The Nextruder V6 Nozzle Adapter makes it possible, opening up a wider range of compatible nozzles. Refer to Prusa's official installation guides when fitting nozzles with this adapter.