[Compatible with Multiple FDM 3D Printers]: This nozzle set is compatible with Anycubic Kobra 2 3D printer, please confirm your 3D printer model before ordering. [10pcs 3D Printer Extruder Nozzle Set]: The input diameter is 1.75mm, the output diameter is 0.4mm, includes 5pcs 0.4mm hardened steel nozzles, 5pcs 0.4mm brass nozzles. Sufficient quantity and two different materials of hotend nozzles make it easy for you to change them in time for quality printing. [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, beveled 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 printing. [High-quality 3D printer parts and accessories]: Made of high-quality hardened steel and brass, which has a large weight, advanced heat treatment process and better oxidation resistance, which extends the life of the nozzle. The contact surface 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-temperature and low-temperature printing filaments on the market. Please note: the physical slight color difference or difference does not affect the use, please do not mind, thank you! Color: Photo color Material: Brass + Hardened steel Package Contents: 5pcs 0.4mm Hardened Steel Nozzles 5pcs 0.4mm Brass Nozzles Above package contents only, 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.