Features: Experience durability Hardened Steel Nozzle, featuring a 0.4mm for precise 3D printing . Hardened steel, with high wear resistance, longer service life. Three metals used: hardened steel for the tip, TC4 Alloy for the inner tube, and chromium-copper for the rest, with different thermaled conductivity. Reduce the heat upwarded conductions in the heating position and dissipate the heat to accelerate the heat conductions. Support high temperatures, wear-resistant and corrosion-resistant. Smooth nozzle inner wall, no burr, small viscosity coefficients, smoother wire discharge.. Quickly replace the nozzle, lower replacement cost, the nozzle part of the use of. Specifications: Material: Hardened Steel Size: about 41.7x10mm/1.64x0.39in Nozzle size: 0.4mm Suitable for: 1.75mm Filaments Quantity: 1Set Package Includes: 1Set Hardened Nozzle 0.4mm note: Due to the problemsof lighting effect , there mightbe certain tolerances in product, please understand. Please allow 0-1cm error due to the measurement.