1[Compatible Models] This kit includes 10 pieces 0.4mm brass nozzles, specifically designed for Neptune 4 and for Neptune 4 Pro 3D printers. 2[High Speed Printing] The 3D printer brass nozzle enables high flow and high speed printing, supporting fast print speeds of up to 600mm. 3[High Temperature Resistant] The extruder nozzle ensures rapid heating and continuous printing of high temperature filaments, as brass can withstand temperatures up to 300. 4[Uniform Ni Plating] The even ni plating on the surface significantly reduces the adhesion of fine metal filaments to the nozzle. Smoothly inner wall without any burrs ensures smoother extrusion with reduced viscosity. 5[Wide Material Compatibility] These nozzles are suitable for most materials, including PLA, ABS, PETG, TPE, TPU, PC, as well as high temperature filaments such as PEEK, PEKK, PEI, PSU, PPSU.