[Compatible with Multiple FDM 3D Printers]: This nozzle set is compatible with Centauri Carbon/Centauri 3D printers, please confirm your 3D printer model before ordering. [High-Precision Nozzles]: The nozzle set is made of high-precision CNC machining, with better thermal conductivity and high hardness, smooth and burr-free inner wall, low viscosity coefficient, nozzle error less than 0.02mm, chamfered and rounded to reduce the resistance of the diamond angle to the filament, smoother filament feeding, not easy to clog, to provide you with accurate and smooth extrusion prints. [High-Quality 3D Printer Parts & Accessories]: Made of high-quality hardened steel, which has a large weight, advanced heat treatment process and better oxidation resistance, extending the life of the nozzle. The contact is flat, which solves the problem of filament leakage and effectively prevents leakage from the print head. Stable performance and durability. Compatible with most high and low temperature printing filaments on the market. Please note: the physical color difference or difference does not affect the use, please do not mind, thank you! Color: Black Material: Hardened Steel Package Contents: 6PCS x 0.4mm Nozzles 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 +/- 1-3 cm.