Features: 3D extruder nozzles are made of hard steel, brass and stainless steel, sturdy and durable, with good heat resistance, wear resistance and corrosion resistance, easy to install and replace, suitable for 3D under high temperature print. These printer nozzles are cut with a diamond knife to make the contact surface smooth and smooth, which can effectively prevent the print for head from leaking and avoid nozzle clogging; The outer surface of the 3D printer nozzle is engraved with size information, which can help you distinguish nozzles of different sizes. Extruder nozzles of different sizes, which are 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm and 0.6 mm; the quantity is sufficient, and the size is diverse, which is convenient for you to replace in for time to achieve smooth printing. The inner wall of the 3D printer extruder nozzle is smooth and easy of burrs, and the viscosity coefficient is small; The diameter error of the extruder nozzle is less than 0.02 mm, providing you with accurate and smooth extrusion results. These 3D printer extruder nozzles are for Creality CR-10, Ender 3, Ender 3 Pro, and for all 1.75 mm for Prusa 3D printers. Specifications: Material: Brass+Stainless Steel Nozzle caliber: 0.4 mm Filament diameter: 1.75 mm Size: 185x115mm/ 7.28x4.53 in Package Includes: 2 x Hardened steel 3D printer nozzles 4 x Stainless steel 3D printer nozzles 19 x Brass 3D printer nozzles note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.