1Applicable Model: 0.4mm 3D printer high flow nozzle set, suitable for Neptune 4, for Neptune 4 Pro printer, which can directly replace old or damaged nozzles. 2High Efficiency: The thermal conductivity coefficient of this nozzle is 300W/mk, ensuring uniform heating, and supporting a printing speed of 600mm/s. 3Applicable Material: These nozzles are suitable for most materials, such as PLA, ABS, PETG, TPE, TPU, PC, etc., as well as PEEK, PEKK, PEI, PSU, and PPSU filament. 4Smooth Extrusion: Pipeline inner wall roughness Ra<0.4, effectively reduces blockage, enhances the fluidity of consumable, and provides fast thermal conductivity. 5Hardened Steel: These nozzles are made of excellent hardened steel, with good wear resistance, heat resistance, can print up to a maximum temperature of 500. 6Specifications: Includes 10pcs hardened steel nozzles, with 0.4mm nozzle hole and standard M6 thread to ensure reliable connection and stable printing.