Product review

This kit ships with three hardened steel nozzles in 0.4 mm, 0.6 mm and 0.8 mm diameters and the complete quick-swap hotend assembly designed for the Kobra S1 Max. The nozzles are manufactured from hardened steel to resist wear when printing abrasive filaments like carbon-fiber blends, while non-abrasive materials such as PLA, ABS and PETG are also supported.

The internal heat break uses a titanium-alloy construction to limit heat conduction up the filament path, helping prevent premature softening and throat clogs. The heating block is brass, chosen for rapid heat-up and stable thermal behavior; the assembly is rated for continuous operation up to around 350°C to accommodate higher-temperature materials.

The product adopts an integrated all-metal quick-swap design so the entire hotend can be removed or replaced quickly without disassembling the nozzle, heater cartridge and thermistor separately. That makes changing nozzle diameter fast and tidy, which is useful for comparing print speed and detail or for switching to an abrasion-capable nozzle.

The package typically includes thermal protection covers and basic cleaning/accessory items to aid installation and maintenance. For safe use, avoid touching the hotend when it’s powered or at temperature, and perform PID tuning after fitting the hotend to stabilise temperature and ensure consistent extrusion and surface finish.

Compatibility is targeted at the Anycubic Kobra S1 Max platform; physical fit and bracket clearances can vary, so verify mechanical fit before committing to a swap. The kit is aimed at hobbyists and experienced users who want quick nozzle changes and durability when running abrasive filaments.

Pros

Hardened steel resists abrasive filament wear
Three nozzle sizes for speed vs detail trade-offs
Quick-swap all-metal hotend for fast changes

Cons

Must confirm physical compatibility with your hotend
Fit/finish may vary and affect thermal contact
Not interchangeable with non-Max S1 variants

VerdictA durable, quick-change nozzle set that brings abrasion resistance and three common nozzle sizes to the Kobra S1 Max. Good for abrasive materials and faster, larger prints; simple to swap but double-check mechanical compatibility with your hotend and run PID tuning after installation.

Reviews

Cariadlawn 5/5

Convenient replacement nozzles to keep on hand

A practical set if you own the compatible S1 Max. The three sizes cover most use cases and the hardened steel should stand up to abrasive filaments. Packaging and build looked fine; it's nice to have spares rather than wait for the original to wear out.
Toto 4/5

Useful for testing diameters, but check fit first

Good concept for trying different nozzle sizes quickly — the full hotend swap lets you change in seconds without dismantling individual parts. The kit includes thermal covers and cleaning tools, which is handy for comparisons of speed and print quality. Still, you need to be careful about compatibility with your exact machine.
Alessandro Bertoz 1/5

Had to return — didn't fit my S1 Max

I returned these because they wouldn't install on my Kobra S1 Max. The stock unit fits correctly, but these prevent the quick-swap clamps from closing, so they were unusable for me.
KEI 4/5

Bought the wrong model, product looks acceptable

I mistakenly ordered the Max version instead of the S1, and the shapes differ so I couldn't use them. The parts themselves seemed okay — a few machining marks were visible and might slightly reduce thermal contact — but overall the three-piece kit and included accessories make it an easy, lower-cost way to try alternate nozzles.