Prime Quality--The 3D printer nozzles are made of high quality brass, the nozzle cleaning needles are made of premium stainless steel. Heavy duty and provide a long service life. 0.4mm Golden Nozzles--The extruder nozzles can prevent print head from leakage effectively and produce consistent prints with smooth and glossy polish. Reduce the resistance from the corners and avoid blocking of the filament with rounded chamfer. Excellent Cleaning Needles--The nozzle cleaning needles are very flexible and robust, easy to bend the needle into nozzle and will not break. Perfect to handle tough extruder hot end nozzle clogs. Useful Combination--The needles are designed for 0.4mm 3D printer nozzles including such as Makerbot Creality, CR-10, Ender 2, Ender 3, etc. The needles are also suitable for everything used as a nozzle. Package Include--20 x 0.4mm 3D printer nozzles, 5 x nozzle cleaning needles, 1 x transparent storage box