Slim Inner Wall: Compared to conventional nozzles, the MK nozzle has a smooth inner wall with less interference, lower viscosity and smoother filament sliding. Precise Finish During Printing: The specially crafted MK nozzle, fabricated utilizing cutting-edge processing techniques, contributes to achieving significantly smoother final prints. Round Opening Feed Chamfer: Engineered with a seamless feeder featuring a rounded opening, this design significantly diminishes filament friction resistance, facilitating a more consistent filament supply. Standard 0.4mm Diameter: These nozzles, with a diameter of 0.4mm, are crafted from high-quality brass sourced internationally, ensuring excellent thermal conductivity and robust strength. Wide Compatibility: Suitable for use with the CR-6 SE, Ender-3 Series, Ender-5 Series, Ender-6, CR-10, CR-10S, CR-10mini, CR-10max, CR-10 V2, CR-10 V3, and Ender 3 S1 Series.