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Hardness in figures, five at once

MICREEN MK8 hardened steel nozzles 0.4 mm, 5 pieces

Five 0.4 mm MK8 nozzles in hardened tool steel from MICREEN, stated at 50 HRC overall and 55–60 HRC at the surface and to withstand 450 °C, sold for filaments from PLA to carbon fibre and PEEK.

Five dark grey MICREEN steel MK8 nozzles, each engraved 0.4

MICREEN MK8 hardened steel nozzles 0.4 mm, 5 pieces

Five 0.4 mm MK8 nozzles in hardened tool steel from MICREEN, stated at 50 HRC overall and 55–60 HRC at the surface and to withstand 450 °C, sold for filaments from PLA to carbon fibre and PEEK.

Hotend standard
MK8 heater blocks; E3D V5/V6 and Ender 2, 3S and 3 Pro, CR-10 all-metal hotend, Prusa i3, Anet A8 and RepRap named, third bullet
Orifice diameter
0.4 mm, title and fourth bullet
Material
Hardened tool steel, 50 HRC overall and 55–60 HRC at the surface, first bullet
Length
Absent from the listing
Abrasion resistance
Good abrasion resistance stated, first bullet; carbon fibre filaments named, second bullet
Pack contents
5 black hardened steel nozzles of 0.4 mm, fifth bullet
Amazon reference
B097PB3TGD (same reference on 6 Amazon marketplaces)
EAN
0721703126698
  • Hardness figures published: 50 HRC overall, 55–60 HRC surface
  • Up to 450 °C stated for the nozzle
  • Only 0.4 mm

Best for: An MK8-type printer owner planning regular carbon fibre prints.

≈ $9 / £8 / 10 €
Check price on Amazon

Specifications

Hotend standard
MK8 heater blocks; E3D V5/V6 and Ender 2, 3S and 3 Pro, CR-10 all-metal hotend, Prusa i3, Anet A8 and RepRap named, third bullet
Orifice diameter
0.4 mm, title and fourth bullet
Material
Hardened tool steel, 50 HRC overall and 55–60 HRC at the surface, first bullet
Length
Absent from the listing
Abrasion resistance
Good abrasion resistance stated, first bullet; carbon fibre filaments named, second bullet
Pack contents
5 black hardened steel nozzles of 0.4 mm, fifth bullet
Amazon reference
B097PB3TGD (same reference on 6 Amazon marketplaces)
EAN
0721703126698

The MICREEN nozzle listing, bullet by bullet

Five bullets: hardened tool steel at 50 HRC overall and 55–60 HRC at the surface, for abrasion, heat and corrosion resistance; up to 450 °C, for filaments from PLA and ABS to carbon fibre and even PEEK; fitting on MK8 heater blocks, with E3D V5/V6, Ender, CR-10 all-metal, Prusa i3 and Anet A8 hotends named; a smooth, burr-free 0.4 mm inner wall; and five black nozzles in the pack.

MICREEN hardness as a number

50 and 55–60 HRC. Rockwell figures describe how the steel resists wear, and MICREEN gives both the overall and the surface value. The other hardened steel nozzle here, from Uxsjakjsd, says hardened and gives no figure.

MICREEN, 450 °C and PEEK

The 450 °C is the nozzle’s figure. The listing gives no temperature for the hotends it names, so for PEEK the printer’s own limit is the one to look up.

Availability

At the last look-up, the German, French, Italian and Spanish Amazon stores were asking 10 € to 11 €.

It is sold in the American and British Amazon stores as well, in their own currency, which the euro figures above leave out on purpose.

Every figure here is Keepa’s reading on the date this page was last updated. Stock and prices can change at any time.

Prices quoted in this text were read on 15 September 2026. The live price is at the top of the page.

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