ITEM NAME:19PCS Brass Extruder Nozzle Print Head For MK8 Makerbot Reprap Printer To MNW.Product list: 19Pcs Extruder Nozzle Head Set. This 19pcs printer nozzle heads are important accessories for 1.75mm pla abs printer. Good and durable extruder brass nozzle print head. Material: brass.