3D Printer Extruders by Daewon Industries. Details:Includes: 1) MK10 Nozzles for 1.75MM or 3MM filament Material: Brass Filament inlet: 1.75mm Fit for: Wanhao Dupicator D4/I3 and various Makerbot 3D Printers Please verify that these are the nozzle for you printer. M7 thread MK10!!