Features: Premium Material: Built with high-hardness steel, it becomes more wear-resistant after heat treatment, and it can print more filaments, even the high-hardness filaments. High Temperature Resistance: Up to 450°C high temperature resistance ensure fast heating of the high-temperature filaments and continuous printing, and meet more printing needs. Corrosion Resistance for Longer Service Life: Advance d heat treatment process and better anti-oxidation are combinded to prolong the service life of the nozzle. Smooth Inner Wall&Seamles s Junction: With the Ra<0.4 roughness, the inner wall enhances fluidity of filament and brings super smooth extrusion. Flat surface and intense joint effectively solve leakage problem. Extensive Compatibility: Not only suit FDM materials such as PLA, ABS, PETG, TPE, TPU, PC, etc., but also composite filaments with grinding additives such as carbon fiber, glass fiber, steel, wood, boron carbide, tungsten, phosphorescent pigments, etc. Compatible with a variety of Creality models, including CR-10 series, Ender-3 series and Ender-5 series. What You Get: This hardened steel nozzle kit including 8pcs high quality nozzles, 0.25mm (1pc), 0.4mm (3pcs), 0.6mm (2pcs), 0.8mm (2pcs). Specification: Material: Hardened Steel For: Ender-3 Pro/Ender-3/Ender-3 V2/Ender-5/Ender-5 Pro/Ender-5 Plus/Ender-3s/Ender-6/Ender-4/Ender-3 Max/Ender-2 Pro/Ender-2/CR-10S CR-10/CR-10 S5/CR-10 S4/CR-10Mini/CR-20/CR-20 Pro Nozzle Aperture: 0.25mm (1pc), 0.4mm (3pcs), 0.6mm (2pcs), 0.8mm (2pcs) Mohs Hardness: 7.8 High Temperature Resistance: 450& 8451; Thermal Conductivity: 22W/M·k Inner Wall Roughness: Ra0.4 Package Size: 55x55x40mm/2.1x2.1x1.5in Package Weight: 31g/1oz Packing List: 1 x Hardened Steel Nozzle Kit