It combines the high thermal conductivity of Chrome Copper with the wear resistance of hardened steel,allowing you to easily print filaments filled with a variety of abrasive materials such as GF or luminous while maintaining flowrate and interlayer bond strength and quality. The body of this nozzle has electroless nickel plate to prevent oxidation and increase hardness. and inset the hardened steel Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you Colour:Photo Color Material:Chrome Copper + Hard Steel Package Contents: 2x 3D Printer Nozzles Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.