This is MK8 style nozzle, it is made from a 360 brass base material and plated with TwinClad XT coating. TwinClad XT is a nickel composite coating
MK8 Brass Plated Wear Resistant Nozzle
BIGTREETECH BIQU MK8 Nozzle High Quality Copper alloy/Hardened steel Nozzle 1.75MM Filament 3D Printer Parts For CR10/CR10S - Micro Center
hardened steel nozzle
3D Printer Accessories, Hardened Steel Nozzles MK8 — Anet 3D Printer
The Best MK8 Nozzle Ender 3 V2 Nozzle Manufacturer
The Best MK8 Nozzle Ender 3 V2 Nozzle Manufacturer
MK8 Plated A2 Tool Steel Wear Resistant Nozzle (CR10 / Ender / Tornado — Micro Swiss Online Store
The Best MK8 Nozzle Ender 3 V2 Nozzle Manufacturer
Hardened Steel MK8 Nozzles
Hardened Steel MK8 Nozzles
3D Printer Accessories, Hardened Steel Nozzles MK8 — Anet 3D Printer
【Smooth finish】 3DHUB Pro series nozzles are made with detailed precision to achieve perfection. Roundness: ≤ 0.02 mm, Inner hole roughness: ≤ Ra0.4.
3DHUB PRO Series MK8 Hardened Steel Nozzle 1.75mm for 3D Printer Ender 3 Series and CR-10 Series 0.4mm, 2pcs
CHT Nozzle MK8 High flow 1.75mm Filament Hardened Steel Nozzles — Kingroon 3D