Features: Brand new and high quality This High Flow Nozzles increase the surfaces area for improved thermally transfer. Enable you to print faster. The Nozzles is a preassembled Nozzles and Heatbreak by adopting three metals -Hardened steel for tip, Titanium TC4 for inside tube, and rest is copper material, with different thermally conductivity. Hardened steel have high wear-resistance for longer time, Titanium TC4 reduces heat conductions at the heating position, and copper for heat dissipation to accelerate heat conductions. Have excellent wear resistance, but also have a very low frictions coefficients and excellent corrosion resistance. Upgraded your 3D Printers with this outstanding Nozzles for superior printing result. Specifications: Material:Metal Size:0.4mm/0.6mm Package Includes: 1 Set Hardened Steel Nozzles note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.