Compatible Models: These nozzles kit is Only compatible for Neptune 4 plus, Neptune 4 Max(NOT For Neptune 4, 4 Pro). Package includes: 22 PCS Brass Nozzles ( 10PCS 0.4mm, 3PCS 0.2mm, 3PCS 0.6mm, 3PCS 0.8mm, 3PCS 1.0 mm). High-temperature resistance Good thermal conductivity: The roughness of the inner wall of the pipeline Ra Less than 0.4, reducing blockage, high-temperature resistance, fast heat conduction, and more stable printing. Smooth inner wall without burrs and Smooth extrusion: The inner wall enhances the fluidity of consumables, has a low viscosity coefficient, is not easy to plug, and extrudes more smoothly. Better Compatibility and Applicability: Works with most FDM printing materials, such as PLA, ABS, PETG, TPE, TPU, PC, etc. Colour:gold Material:brass Package Contents: 22 x Brass Nozzles ( 10PCS 0.4mm, 3PCS 0.2mm, 3PCS 0.6mm, 3PCS 0.8mm, 3PCS 1.0 mm) 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 measurement allowed error is +/- 1-3cm.