That is MK8 style nozzle, it’s created from a A2 Tool Steel, warmth treated to 57-62 RC and plated with TwinClad XT coating. In case you are working with abrasive Carbon Fiber, Stainless Steel, wooden filled or every other metal filled filaments, this may increasingly greatly strengthen the lifetime of your nozzle.
A2 Hardened Tool Steel Plated with TwinClad XT
Fits: MK8 Extruders, Creality CR-10, Tevo Tornado, MakerBot, CraftBot, BQ Witbox
Orifice size: .4mm
Made in USA by Micro Swiss