ITEM NAME:10x Brass 0.4mm Extruder Nozzle Print Head for MK8 Makerbot Prusa i3 3DPrint Bj.This Extruder nozzle is a perfect match to the current one on the MakerBot Replicator 2 3D printer as well the RepRapGuru Prusa i3 3D Printer and many others. 10 Pcs Extruder Nozzle Print Head. Nozzle: 0.4mm.