For High-Speed Printing: The thermal conductivity of hardened steel is as high as 330W/mk, ensuring the nozzle heats up more evenly. The volume is twice that of ordinary nozzles, supporting a high-speed printing speed of 600mm. Uniform Nickel Plating, Smoother Extrusion: The nickel-plated layer greatly reduces filament adhesion to the nozzle and provides smoother extrusion. Suitable for most FDM materials such as PLA, ABS, PETG, TPE, TPU, PC, etc., and PEKK, PEI, PSU, PPSU, and other high-temperature filaments. Hardened Steel Resists Corrosion for Longer Life: Advanced heat treatment process and better are combined to extend the nozzle's lifespan. Suitable for most FDM materials such as PLA, ABS, PETG, TPE, TPU, PC, etc., and composite filaments with abrasive additives such as carbon fiber, glass fiber, steel, wood, boron carbide, tungsten, pigments, etc. Premium Material Handles High-Temperature Filaments: rapid heating of high-temperature filaments and continuous printing. Copper alloy high-temperature resistance up to 500℃, hardened steel high-temperature resistance up to 450℃. Specification: 0.4/0.6/0.8mm Material: Chrome Zirconium Copper / Hard Steel Color: silver Package Contents: 3 x Nozzle 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 to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.