Features: Brand new and high quality Highly polish, small adhesion, high-wear resistance, meet the requirements of precise printing. High quality imported hardened steel bar, special DLC（Diamond-Like Carbon) coating treatments, high-temperature hardness up to HRC62. The whole high-temperature resistance is 450°C, can easily print PEEK and other special engineering plastics. Roughness of inner hole less than Ra0.4, high smoothness and less adhesion. Special processing technology and post-treatments to ensure no burr in the orifice, brighter and cleaner inside the orifice Specifications: Material:Metal Nozzle Hole : 0.4mm Printing Temperature : 450℃ Thermal Conductivity : 26W/m.k Hardness : 7.8.0Mohs Size:Approx.12.6cm/4.96inch Package Includes: 1x Hardened Steel Nozzle note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.