30PCS Hardened Steel + Brass MK8 Nozzles 0.2-1.0mm w/ Cleaning Tool Kit for Ender 3/CR-10 Review (2026)

What you get in the box

This kit bundles 30 MK8-style nozzles across seven sizes, from 0.2mm up to 1.0mm, with the 0.4mm size making up the bulk of the count since it is the default nozzle on most Ender 3 and CR-10 printers. A 10-piece cleaning tool kit is included alongside the nozzles, covering needles and a wrench for clearing clogs and swapping nozzles. The listing describes a mix of hardened steel and brass nozzles rather than an even split across every size, so the exact material breakdown per diameter is not spelled out in the title or description. Everything threads onto the standard MK8 nozzle pattern used on Ender 3, Ender 3 Pro, CR-10 series and Prusa i3 style hotends, which covers most budget and midrange FDM printers on the market.

Materials and what they are for

Brass nozzles are the standard choice for PLA, PETG and other non-abrasive filaments, since brass conducts heat well and is easy to machine to a precise bore. Hardened steel nozzles resist wear from abrasive filaments such as those loaded with carbon fiber, wood fiber or metal particles, which would gradually enlarge a brass nozzle's opening over time. Having both types in one kit means you do not need to buy a separate abrasive-rated nozzle set if you print a mix of standard and reinforced filaments. The trade-off is that hardened steel nozzles conduct heat less efficiently than brass, so they are better reserved for abrasive materials rather than everyday PLA use.

Sorting and labeling matters

Because hardened steel and brass nozzles can look nearly identical once installed, especially in the smaller sizes, it is worth sorting the kit into a labeled tray or small parts organizer as soon as it arrives. A magnet works well to quickly separate the two: hardened steel nozzles are magnetic while brass nozzles are not, which is a fast way to confirm what you are installing before a print. Mixing them up will not damage your printer, but using a brass nozzle with an abrasive filament will wear out the bore faster than expected, and using a hardened steel nozzle unnecessarily on PLA gives you slightly less consistent thermal transfer than brass would.

Using the cleaning tool kit

The included cleaning tools are meant for routine maintenance rather than deep disassembly. Needles in a few thicknesses let you clear partial clogs by heating the nozzle to printing temperature and running a needle through the bore, while a wrench-style tool helps grip the nozzle's hex flats when swapping it out on a cold or warm hotend. Keeping a dedicated cleaning kit next to your printer means you are less likely to reach for a random pin or wire that could scratch or deform the nozzle opening. For anyone who prints regularly with multiple filament types, having these tools on hand reduces the downtime spent troubleshooting extrusion issues.

Who this kit suits

This is a practical pickup for anyone running an Ender 3, Ender 3 Pro or CR-10 series printer who wants to experiment with nozzle diameter rather than staying locked to the stock 0.4mm size. Smaller nozzles like 0.2mm and 0.3mm suit fine detail miniatures at the cost of print speed, while 0.6mm through 1.0mm nozzles trade some resolution for much faster large-volume prints. Because the kit spans both nozzle diameter and material type in one purchase, it works out cheaper than buying single-size packs separately, though buyers who only ever print PLA at 0.4mm may find most of the kit goes unused.

Frequently asked questions