MK8 nozzles are made of high-quality brass material. Heavy duty and provide a long service life.Easy to install and change. 3d printer nozzles can prevent the 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. Easy to identify with engraving the size on each nozzle. MK8 extruder nozzles fit for 3D Printer Makerbot Creality CR-10, MK8 Makerbot Reprap Prusa I3, compatible with all 1.75mm PLA ABS 3D printers. Fit exactly like the original.