3D Printer Kit Extruder Nozzle Head Cleaner Bits 1 each .2mm .25mm .3mm .35mm .4mm .45mm .5mm WILL extend the life of your nozzles and improve print quality From Daewon Industries Tungsten Carbide Japanese bits Shipped in a protective plastic case .2 .25 .3 .35 .4 .45 .5mm bits