For high-speed printing: The thermal conductivity of hardened steel is as high as 330W/mk, which ensures that the nozzle heats up more evenly. The volume is twice that of ordinary nozzles, supporting a high-speed printing speed of 600mm. Smooth nickel plating, smoother extrusion: The nickel-plated layer on the surface significantly reduces the adhesion of filaments to the nozzle and provides smoother extrusion. x Applicable to most FDM materials such as PLA, ABS, , 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 combined to extend the life of the nozzle. Applicable to most FDM materials such as PLA, ABS, , TPE, TPU, PC, etc., and composite filaments with abrasive additives such as carbon fiber, glass fiber, steel, wood, boron carbide, tungsten, pigments, etc. Premium materials handle high-temperature filaments: rapid heating of high-temperature filaments and continuous printing x Copper alloy high temperature resistance up to 500, hardened steel high temperature resistance up to 450. Specification: 0.4/0.6/0.8 mm Material: Chromium zirconium copper / hard steel color: black 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 a little different from the real thing. The allowed measurement error is +/- 1-3 cm.