MK7/MK8 Brass/Copper Extruder Nozzles 0.4mm - M6 Thread Extrusion Print Head for 1.75mm 3D Printer Filament &ndash; Parts Compatible with Makerbot, RepRap & Prusa i3, Pack of 5 GREAT PRINTS: This finely crafted MK7/MK8 nozzle helps you get the best results from your 3D printer, producing accurate, high quality prints. STANDARD SIZE: The 0.4mm print head is the most popular extruder nozzle size for 1.75mm filament, balancing print speed and precision. BRASS NOZZLE:Constructed from brass and copper, these extruder parts are ideal for printing non abrasive materials. COMPATABILITY: The versatile nozzles are designed to fit many extruders including Makerbot,RepRap and Prusa i3. AMX3D ACCESSORIES: The best 3D Prints start with the best tools! AMX3d provides 3D printing supplies of the highest quality. If there are any problems with your Extruder Nozzles just let us know!